Score : $100$ points

Problem Statement

You are given an integer $N$ that has exactly four digits in base ten. How many times does 2 occur in the base-ten representation of $N$?

Constraints

• $1000 \leq N \leq 9999$

Input

Input is given from Standard Input in the following format:

$N$

Output

Print the answer.

1222

3

2 occurs three times in 1222. By the way, this contest is held on December $22$ (JST).

3456

0

9592

1