#include<iostream>
#include<cstdio>
using namespace std;
int a,b,c,d;
float x;
char p;
main()
{
	scanf("%d %d UTC%c%d.%d",&a,&b,&p,&c,&d);
	if(p=='+')
	{
		b=b+d*6;
		if(b>=60)b-=60,a++;
		a=(a-9+c+24)%24;
	}
	else
	{
		if(d!=0)b=b-(10-d)*6;
		if(b>=60)b-=60,a++;
		a=(a-9-c+24)%24;
	}
	printf("%02d:%02d\n",a,b);
}