Morris' Blog 我在摸索我存在的意義、生命的意義、內涵及價值。 沒有真正神手般的厲害，套用模式是大部分的情況。 沒那麼厲害的我存在的意義為何，襯托出神的存在？ 有時候不能怪別人不給我機會，我已經開始省思， 為什麼我沒有給別人機會的原因，而是全要靠別人。 有時候我認為我與眾不同，那是因為我做不到很多人能辦到的事情。 我聽不到、玩不起來、說得不夠明瞭、理解得不夠多， 我缺少的語文能力，就是一切一切無能的判定。 為此，我不曉得能做些對別人有幫助的事情。 我知道我自己是個不服輸的性格，但現在我不得不認輸。 我沒有能力，因此我必須認輸。 我到底來這世界作什麼？處處充滿不確定性， 而我總是無法出類拔萃，想當個一般人似乎也回不了頭了。 越強大的挑戰需要越強力的支持，而我的支持是什麼？ 最近嘗試與人談話，但都是失敗的結局，沒人能接受， 不需要言語，不需要溝通，一切所想都表達不出來。

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Problem G. Secret word

Alicia and Roberto like to play games. Today, Roberto is trying to guess a secret word that Alicia chose. Alicia wrote a long string S in a piece of paper and gave Roberto the following clues:

• The secret word is a non-empty substring¹ of S (possibly equal to S).
• S starts with the secret word reversed.

Roberto knows Alicia very well, and he’s sure that if there are several possible secret words that satisfy the clues above, Alicia must have chosen the longest one.

Can you help him guess the secret word?

Input

The first line of the input file contains a single integer number T ≤ 150, the number of test cases.

T lines follow, each with a single string S. S will only contain lowercase English letters. The length of S will not exceed one million characters.

Output

For each test case, output the secret word in one line.

Sample input and output

Explanation of the sample cases

• colombia: if you take c and reverse it you get c.   colombia starts with c, so this satisfies the two clues above. Furthermore, c is the longest word that satisfies the two clues so it must be the secret word.
• abcdba: if you take ba and reverse it you get ab.   abcdba starts with ab and there’s no longer substring that satisfies the two clues.
• neversayeven: if you take even and reverse it you get neve. neversayeven starts with neve and there’s no longer substring that satisfies the two clues.
• neveroddoreven: this case is a palindrome so if we reverse it we get the same string. neveroddoreven starts with neveroddoreven (since they are the same) and obviously there’s no longer substring that satisfies that, so this is the secret word.
• listentothesilence: Notice the secret word might be somewhere in the middle of the big word.

Footnotes