#include<stdio.h>
void main()
{
    int column1, column2;
    for(column1=1 ; column1<=5 ; column1=column1+1)
    {
        for(column2=1; column2<=4 ; column2=column2+1)
        {
            printf("%i %i \n",column1, column2);
        }
    }
}

1 1 
1 2 
1 3 
1 4 
2 1 
2 2 
2 3 
2 4 
3 1 
3 2 
3 3 
3 4 
4 1 
4 2 
4 3 
4 4 
5 1 
5 2 
5 3 
5 4