Background

输入一个字符，如果输入的字符是数字，输出yes，否则输出no

Description

Given two integers x and y, print the sum.

Format

Input

Two integers x and y, satisfying $0\leq x,y\leq 32767$ .

Output

One integer, the sum of x and y.

Samples

5

yes

Limitation

1s, 1024KiB for each test case.