diff --git a/2023/cmd/cmd.cpp b/2023/cmd/cmd.cpp
index 0b84374..adbb6e9 100644
--- a/2023/cmd/cmd.cpp
+++ b/2023/cmd/cmd.cpp
@@ -108,9 +108,23 @@ void usage(std::ostream &s) {
     << "   Runs all solutions\n\n";
 }
 
+std::string datafile(int day) {
+  return std::format("./data/{:02d}/input.txt", day);
+}
+
 bool solve_day(
     std::map<const int, std::unique_ptr<xmas::solution>>::value_type const
         &solution) {
+  
+  try {
+    solution.second.get()->load(datafile(solution.second->day()));
+  } catch (std::runtime_error &e) {
+    log_error("day {} could not load: {}\n", solution.second.get()->day(),
+              e.what());
+    return false;
+  }
+  
+  
   try {
     solution.second.get()->run();
     return true;
diff --git a/2023/cmd/cmd.hpp b/2023/cmd/cmd.hpp
index b7b5007..5ebc3b1 100644
--- a/2023/cmd/cmd.hpp
+++ b/2023/cmd/cmd.hpp
@@ -5,7 +5,7 @@
 #include <map>
 #include <memory>
 
-#include "xmaslib/solvebase/solvebase.hpp"
+#include "xmaslib/solution/solution.hpp"
 
 
 int run(std::vector<std::string_view> &args);
diff --git a/2023/compile_commands.json b/2023/compile_commands.json
index d603855..6bf8fa7 100644
--- a/2023/compile_commands.json
+++ b/2023/compile_commands.json
@@ -7,10 +7,16 @@
 },
 {
   "directory": "/home/edu/AdventOfCode/2023/build/Release/solvelib",
-  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/xmaslib/.. -I/home/edu/AdventOfCode/2023/build/Release/_deps/doctest-src -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/solvelib.dir/01/day01.cpp.o -c /home/edu/AdventOfCode/2023/solvelib/01/day01.cpp",
+  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/xmaslib/.. -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/solvelib.dir/01/day01.cpp.o -c /home/edu/AdventOfCode/2023/solvelib/01/day01.cpp",
   "file": "/home/edu/AdventOfCode/2023/solvelib/01/day01.cpp",
   "output": "solvelib/CMakeFiles/solvelib.dir/01/day01.cpp.o"
 },
+{
+  "directory": "/home/edu/AdventOfCode/2023/build/Release/xmaslib",
+  "command": "/usr/bin/c++   -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/xmaslib.dir/solution/solution.cpp.o -c /home/edu/AdventOfCode/2023/xmaslib/solution/solution.cpp",
+  "file": "/home/edu/AdventOfCode/2023/xmaslib/solution/solution.cpp",
+  "output": "xmaslib/CMakeFiles/xmaslib.dir/solution/solution.cpp.o"
+},
 {
   "directory": "/home/edu/AdventOfCode/2023/build/Release/xmaslib",
   "command": "/usr/bin/c++   -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/xmaslib.dir/registry/registry.cpp.o -c /home/edu/AdventOfCode/2023/xmaslib/registry/registry.cpp",
@@ -19,20 +25,14 @@
 },
 {
   "directory": "/home/edu/AdventOfCode/2023/build/Release/cmd",
-  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/solvelib/.. -I/home/edu/AdventOfCode/2023/xmaslib/.. -I/home/edu/AdventOfCode/2023/build/Release/_deps/doctest-src -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/aoc2023.dir/main.cpp.o -c /home/edu/AdventOfCode/2023/cmd/main.cpp",
+  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/solvelib/.. -I/home/edu/AdventOfCode/2023/xmaslib/.. -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/aoc2023.dir/main.cpp.o -c /home/edu/AdventOfCode/2023/cmd/main.cpp",
   "file": "/home/edu/AdventOfCode/2023/cmd/main.cpp",
   "output": "cmd/CMakeFiles/aoc2023.dir/main.cpp.o"
 },
 {
   "directory": "/home/edu/AdventOfCode/2023/build/Release/cmd",
-  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/solvelib/.. -I/home/edu/AdventOfCode/2023/xmaslib/.. -I/home/edu/AdventOfCode/2023/build/Release/_deps/doctest-src -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/aoc2023.dir/cmd.cpp.o -c /home/edu/AdventOfCode/2023/cmd/cmd.cpp",
+  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/solvelib/.. -I/home/edu/AdventOfCode/2023/xmaslib/.. -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/aoc2023.dir/cmd.cpp.o -c /home/edu/AdventOfCode/2023/cmd/cmd.cpp",
   "file": "/home/edu/AdventOfCode/2023/cmd/cmd.cpp",
   "output": "cmd/CMakeFiles/aoc2023.dir/cmd.cpp.o"
-},
-{
-  "directory": "/home/edu/AdventOfCode/2023/build/Release/test",
-  "command": "/usr/bin/c++  -I/home/edu/AdventOfCode/2023/build/Release/_deps/doctest-src -I/home/edu/AdventOfCode/2023/solvelib/.. -I/home/edu/AdventOfCode/2023/xmaslib/.. -Wall -Werror -Wextra -Wpedantic -Wconversion -O3 -DNDEBUG -std=gnu++20 -o CMakeFiles/test.dir/test.cpp.o -c /home/edu/AdventOfCode/2023/test/test.cpp",
-  "file": "/home/edu/AdventOfCode/2023/test/test.cpp",
-  "output": "test/CMakeFiles/test.dir/test.cpp.o"
 }
 ]
\ No newline at end of file
diff --git a/2023/data/01/example.txt b/2023/data/01/example.txt
new file mode 100644
index 0000000..1ba8437
--- /dev/null
+++ b/2023/data/01/example.txt
@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet
\ No newline at end of file
diff --git a/2023/data/01/input.txt b/2023/data/01/input.txt
new file mode 100644
index 0000000..1ba8437
--- /dev/null
+++ b/2023/data/01/input.txt
@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet
\ No newline at end of file
diff --git a/2023/solvelib/01/day01.cpp b/2023/solvelib/01/day01.cpp
index 206aa81..606c1aa 100644
--- a/2023/solvelib/01/day01.cpp
+++ b/2023/solvelib/01/day01.cpp
@@ -1,5 +1,9 @@
 #include "day01.hpp"
+#include <iostream>
 
-std::int64_t Day01::part1() { return 1; }
+std::int64_t Day01::part1() {
+  std::cout << this->input << std::endl;
+  return 1;
+}
 
 std::int64_t Day01::part2() { return 2; }
diff --git a/2023/solvelib/01/day01.hpp b/2023/solvelib/01/day01.hpp
index b70ba2a..44e215b 100644
--- a/2023/solvelib/01/day01.hpp
+++ b/2023/solvelib/01/day01.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "xmaslib/solvebase/solvebase.hpp"
+#include "xmaslib/solution/solution.hpp"
 
 class Day01 : public xmas::solution {
 public:
@@ -9,4 +9,5 @@ class Day01 : public xmas::solution {
 public:
   std::int64_t part1() override;
   std::int64_t part2() override;
+
 };
diff --git a/2023/xmaslib/CMakeLists.txt b/2023/xmaslib/CMakeLists.txt
index 516c7f2..12a9b87 100644
--- a/2023/xmaslib/CMakeLists.txt
+++ b/2023/xmaslib/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_library(xmaslib
-    solvebase/solvebase.hpp
+    solution/solution.hpp solution/solution.cpp
     registry/registry.hpp registry/registry.cpp
 )
 
diff --git a/2023/xmaslib/registry/registry.hpp b/2023/xmaslib/registry/registry.hpp
index f97d582..3a4f0b9 100644
--- a/2023/xmaslib/registry/registry.hpp
+++ b/2023/xmaslib/registry/registry.hpp
@@ -5,7 +5,7 @@
 #include <map>
 #include <memory>
 
-#include "../solvebase/solvebase.hpp"
+#include "../solution/solution.hpp"
 
 namespace xmas {
 
diff --git a/2023/xmaslib/solution/solution.cpp b/2023/xmaslib/solution/solution.cpp
new file mode 100644
index 0000000..45f085a
--- /dev/null
+++ b/2023/xmaslib/solution/solution.cpp
@@ -0,0 +1,40 @@
+#include "solution.hpp"
+
+#include <format>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <stdexcept>
+
+namespace xmas {
+
+void solution::run() {
+  std::cout << "Day 1" << std::endl;
+  try {
+    const auto p1 = this->part1();
+    std::cout << " Result 1: " << p1 << '\n';
+  } catch (std::runtime_error &err) {
+    std::cerr << "Part 1 failed with message: " << err.what() << std::endl;
+  }
+
+  try {
+    const auto p2 = this->part2();
+    std::cout << " Result 2: " << p2 << '\n';
+  } catch (std::runtime_error &err) {
+    std::cerr << "Part 2 failed with message: " << err.what() << std::endl;
+  }
+}
+
+void solution::load(std::string_view path) {
+  std::ifstream f(path.data());
+  std::stringstream buff;
+  buff << f.rdbuf();
+  input = std::move(buff).str();
+
+  if (input.size() == 0) {
+    throw std::runtime_error(
+        std::format("did not load any data from {}", path));
+  }
+}
+
+} // namespace xmas
\ No newline at end of file
diff --git a/2023/xmaslib/solution/solution.hpp b/2023/xmaslib/solution/solution.hpp
new file mode 100644
index 0000000..fdc7da6
--- /dev/null
+++ b/2023/xmaslib/solution/solution.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <cstdint>
+#include <optional>
+#include <stdexcept>
+
+namespace xmas {
+
+class solution {
+public:
+  virtual int day() = 0;
+
+  virtual void run();
+  virtual void load(std::string_view path);
+
+protected:
+  virtual std::int64_t part1() { throw std::runtime_error("not implemented"); }
+  virtual std::int64_t part2() { throw std::runtime_error("not implemented"); }
+
+  std::string input;
+
+private:
+  std::optional<std::int64_t> p1;
+  std::optional<std::int64_t> p2;
+};
+
+} // namespace xmas
\ No newline at end of file
diff --git a/2023/xmaslib/solvebase/solvebase.hpp b/2023/xmaslib/solvebase/solvebase.hpp
deleted file mode 100644
index ea5873b..0000000
--- a/2023/xmaslib/solvebase/solvebase.hpp
+++ /dev/null
@@ -1,40 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <iostream>
-#include <optional>
-#include <stdexcept>
-
-namespace xmas {
-
-class solution {
-public:
-  virtual int day() = 0;
-
-  virtual void run()  {
-    std::cout << "Day 1" << std::endl;
-    try {
-      const auto p1 =this->part1();
-      std::cout << " Result 1: " << p1 << '\n';
-    } catch (std::runtime_error &err) {
-      std::cerr << "Part 1 failed with message: " << err.what() << std::endl;
-    }
-
-    try {
-      const auto p2 = this->part2();
-      std::cout << " Result 2: " << p2 << '\n';
-    } catch (std::runtime_error &err) {
-      std::cerr << "Part 2 failed with message: " << err.what() << std::endl;
-    }
-  }
-
-protected:
-  virtual std::int64_t part1() { throw std::runtime_error("not implemented"); }
-  virtual std::int64_t part2() { throw std::runtime_error("not implemented"); }
-
-private:
-  std::optional<std::int64_t> p1;
-  std::optional<std::int64_t> p2;
-};
-
-} // namespace xmas
\ No newline at end of file