#include <stdio.h>

int NOD_1(int n1, int n2) {
	int i;

	for (i = n1; !(n1%i == 0 && n2%i == 0); i--);

	return i;
}

int main() {
    int a[] = {2, 10, 50, 49, 88, 7};
    int i, j;

    for(i = 0; i < sizeof(a)/sizeof(int)-1; i++)
        for(j = i+1; j < sizeof(a)/sizeof(int); j++)
            if (NOD_1(a[i], a[j]) == 1) printf("%d %d\n", a[i], a[j]);

    return 0;
}