#AT2285. A - Middle Letter

A - Middle Letter

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A - Middle Letter

Score : $100$ points

Problem Statement

You are given an odd-length string $S$ consisting of lowercase English letters.

Print the central character of $S$.

What is the central character? For an odd-length string $T$, its central character is the $\frac{|T|+1}{2}$-th character from the beginning, where $|T|$ is the length of $T$.

Constraints

  • $S$ is an odd-length string consisting of lowercase English letters.
  • The length of $S$ is between $1$ and $99$ (inclusive).

Input

Input is given from Standard Input in the following format:

SS

Output

Print the answer.


atcoder
o

The central character of atcoder is o.


a
a