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.

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

```
$S$
```

Print the answer.

-   $S$ 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.

2

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