#include<cstdio>
int main()
{
	int a, b, c, max = 0, min;
	scanf("%d%d%d", &a, &b, &c);
	max = a > max ? a : max;
	max = b > max ? b : max;
	max = c > max ? c : max;
	if (max == a)
	{
		min = b < c ? b : c;
		printf("%d/%d", min,max);
	}
	else if (max == b)
	{
		min = a < c ? a : c;
		printf("%d/%d", min,max);
	}
	else
	{
		min = a < b ? a : b;
		printf("%d/%d", min,max);
	}
	return 0;
}