#include <iostream>
using namespace std;

int main(){
  int a, b;
  double d;
  char pm;
  scanf("%d %d UTC%c%lf", &a, &b, &pm, &d);
  a = (a+-9)%24;

  int ansa, ansb;
  if(pm=='+'){
    ansa = (int)(a+(int)d+((d-(int)d)*60+b)/60+24)%24;
    ansb = (int)((d-(int)d)*60+b)%60;
  }else{
    ansa = (int)(a-(int)d-(-(d-(int)d)*60+b)/60+24)%24;
    ansb = (int)(-(d-(int)d)*60+b+60)%60;
  }

  printf("%02d:%02d\n", ansa, ansb);

  return 0;
}