Accept two square matrices A and B of dimensions n x n as input and compute their sum A + B.
Input
The first line contains the integer n. This is followed by 2n lines. Each of the first n lines is a sequence of comma-separated integers that denotes one row of the matrix A. Each of the last n lines is a sequence of comma-separated integers that denotes one row of the matrix B.
Output
n lines, where each line is a sequence of comma-separated integers that denotes one row of the matrix A + B. There must be no comma at the end of a line.
Example
Input
2
1,2
3,4
5,6
7,8
Output
6,8
10,12
Write a complete program: read the input with input() and print the result with print().
Input
2
1,2
3,4
5,6
7,8
Output
6,8
10,12