Description

Output $(a+b)\bmod 9$

Format

Input

One line, separated by a space, $a$ and $b$.

Output

An integer, $(a+b)$。

Samples

input1

3 6

output1

0

Instructions

$75\%$ of the samples have $n \leq10 ^ 5$ and $n ≥0$ $100\%$ sample $n \leq10 ^ {100}$ and $n ≥0$