[Verify] 484 - The Department of Redundancy Department
[Accepted] 489 - Hangman Judge

 ** 以前的 code 是錯的，只好重寫了
[Verify] 490 - Rotating Sentences
[Verify] 621 - Secret Research
[Verify] 694 - The Collatz Sequence
[Verify] 10035 - Primary Arithmetic

** 離開條件處理錯誤，是兩個 0 代表結束
[Library] substr, trim
奇怪，這些題目一直送不過啊