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Вступ_Заоч-3

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.

Output

Print the required matrix.

Time limit 1 second
Memory limit 128 MiB
Input example #1
2 3
Output example #1
1 2 3
4 5 6
Author "ABC programming"
Source Matviychuk Sergiy Volodymyrovych