1001 A+B Format

1001 A+B Format (20)（20 分）

Calculate a + b and output the sum in standard format -- that is, the

digits must be separated into groups of three by commas (unless there

are less than four digits).

Input

Each input file contains one test case. Each case contains a pair of

integers a and b where -1000000 <= a, b <= 1000000. The numbers

are separated by a space.

Output

For each test case, you should output the sum of a and b in one line.

The sum must be written in the standard format.

Sample Input

-1000000 9

Sample Output

-999,991