#include <stdio.h>
int main(void) {
	int a, b, c = 0;
	scanf("%d %d %d", &a, &b, &c);
	int temp;
	//从小到大排序a,b,c
	if (a > b) {
		temp = a;
		a = b;
		b = temp;
	}
	 if (a > c) {
		temp = a;
		a = c;
		c = temp;
	}
	 if (b > c) {
		temp = b;
		b = c;
		c = temp;
	}

	 
	//	printf("a=%d b=%d c=%d\n",a,b,c);
	printf("%d/%d\n", a, c);
	return 0;
}