#include <unistd.h>
#include <stdio.h>

void my_putchar(char c)
{
        write(1,&c,1);
}

void my_print_comb2(void)
{
        int i[2];

        i[0] = 0;
        i[1] = 0;
        while(i[0] != 10)
        {
                while(i[1] != 10)
                {
                        printf("%i%i, ",i[0],i[1]);
                        i[1]++;
                }
                i[1] = 0;
                i[0]++;
        }
}
int main(){my_print_comb2();}