Problems
Matrix
Matrix
Two positive integers n and m are given. Print the matrix that consists of n lines and m columns, filled with positive integers from 1 to n * m, as shown in the sample.
Input
Two positive integers n and m (1 ≤ n, m ≤ 100).
Output
Print the required matrix.
Input example #1
2 3
Output example #1
1 2 3 4 5 6