Score : $100$ points

问题描述

给定一个由小写英文字母组成的字符串 $S$。字符串 $S$ 的长度在 $1$ 到 $3$（包含两端）之间。

请打印出长度为 $6$ 的字符串，该字符串是 $S$ 的重复。

可以证明，在本题的约束条件下，存在唯一这样一个字符串。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given a string $S$ consisting of lowercase English characters. The length of $S$ is between $1$ and $3$, inclusive.

Print the string of length $6$ that is a repetition of $S$.

It can be shown that there uniquely exists such a string under the Constraints of this problem.

Constraints

• $S$ is a string consisting of lowercase English characters of length between $1$ and $3$, inclusive.

Input

Input is given from Standard Input in the following format:

$S$

Output

Print the answer string, which is of length $6$.

Sample Input 1

abc

Sample Output 1

abcabc

These are strings that are repetitions of $S =$ abc: abc, abcabc, abcabcabc, abcabcabcabc, and so on. Among them, abcabc has the length of $6$, so abcabc should be printed.

Sample Input 2

zz

Sample Output 2

zzzzzz

update @ 2024/3/10 10:42:22