diff --git a/Tutorial/Tutorial.playground/Contents.swift b/Tutorial/Tutorial.playground/Contents.swift
index 9b0d9f6..d59f304 100644
--- a/Tutorial/Tutorial.playground/Contents.swift
+++ b/Tutorial/Tutorial.playground/Contents.swift
@@ -24,9 +24,30 @@ let selectedIndexesFilePath = Bundle.main.path(forResource: "selectedIndexes", o
 let champsData = FileManager.default.contents(atPath: champsFilePath!)
 let selectedIndexesData = FileManager.default.contents(atPath: selectedIndexesFilePath!)
 
-let champs = try JSONSerialization.jsonObject(with: champsData!, options: [])
-let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])
+let champs = try JSONSerialization.jsonObject(with: champsData!, options: []) as? [[String : Any]]
+let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])  as? [Int]
 
-// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
-let names: [String] = []
-print(names)
+//// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
+/// 1번쨰 방법
+champs?.filter {
+    let keyNumer = Int($0["key"] as! String)
+    guard let _selectedIndexList = selectedIndexes?.filter({ return $0 == keyNumer }),
+        _selectedIndexList.count > 0 else {
+        return false
+    }
+    return keyNumer == _selectedIndexList[0]
+}
+.forEach {
+    print($0["name"]!)
+}
+    
+/// 2번쨰 방법
+selectedIndexes?.forEach {
+    let index = "\($0)"
+    champs?.filter {
+        return index == $0["key"] as! String
+    }
+    .forEach {
+        print($0["name"]!)
+    }
+}