Background

• 救救孩子

• 九进制指逢九进一

• 在九进制下,计算x(九进制)+y(九进制)的和(以九进制形式输出)

Description

In base nine,Given two integers x and y, print the sum in base nine.

Format

Input

Two integers x and y, satisfying $0\leq x,y\leq 1e9$ .

Output

One integer, the sum of x and y in base nine.

Samples

123
126

250

Limitation

1s, 1024KiB for each test case.