#include <stdio.h>
int main(void){
	int a;
	int h = 10;
	int m = 0;
	
	scanf("%d",&a);
	
	h += a/100;
	while(h > 23){
		h -= 24;
	}
	m += (a%100)*0.6;
	
	if(h / 10 == 0){
		printf("0");
	}
	printf("%d:",h);
	if(m / 10 == 0){
		printf("0");
	}
	printf("%d\n",m);
	return 0;
}