103420: [Atcoder]ABC342 A - Yay!

Problem Statement

You are given a string $S$ consisting of lowercase English letters. The length of $S$ is between $3$ and $100$, inclusive.

All characters but one of $S$ are the same.

Find $x$ such that the $x$-th character of $S$ differs from all other characters.

Constraints

• $S$ is a string of length between $3$ and $100$, inclusive, consisting of two different lowercase English letters.
• All characters but one of $S$ are the same.

Input

The input is given from Standard Input in the following format:

$S$

Output

Print the answer.

Sample Input 1

yay

Sample Output 1

2

The second character of yay differs from the first and third characters.

Sample Input 2

egg

Sample Output 2

1

Sample Input 3

zzzzzwz

Sample Output 3

6

问题描述

给你一个由小写英文字母组成的字符串$S$。$S$的长度在3到100之间，包括3和100。

$S$中除了一个字符外，其他字符都相同。

找到这样的$x$，使得$S$的第$x$个字符与其他字符不同。

约束条件

• $S$是一个长度在3到100之间的字符串，由两种不同的小写英文字母组成。
• $S$中除了一个字符外，其他字符都相同。

输入

输入数据通过标准输入给出，如下所示：

$S$

输出

输出答案。

样例输入1

yay

样例输出1

2

yay的第二个字符与其他字符不同。

样例输入2

egg

样例输出2

1

样例输入3

zzzzzwz

样例输出3

6