You are given numbers a and b. Calculate the sum of a and reverse of b. A reverse of a number is a number which contains the same digits in reverse order. For example, reverse of 230 is 32, and reverse of 0 is 0.

Input

The input contains two integers a and b (0 ≤ a, b ≤ 109), separated by a single space. The numbers are given without leading zeros.

Output

Output the sum of a and reverse of b.

Examples

Input

5 15


Output

56


Input

73 9180


Output

892

Source: codeforces | Difficulty: EASY
Tags: Implementation


Solutions: