#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int n;
int main(){
  scanf("%d",&n);
  for(int i=1;i<=n;i++){
    int a,b;
    scanf("%d%d",&a,&b);
    char s=getchar();
    int x=0;
    while(s!='+'&&s!='-')s=getchar();
    int op=1;
    if(s=='+')op=1;
    else op=-1;
    s=getchar();
    while(isdigit(s)){x=x*10+s-'0';s=getchar();}
    int d=0;
    double tp=6;
    // putchar(s);
    if(s=='.'){
      s=getchar();
      while(s!='\n'){
     int pl=s-'0';
     d=d+(int)(1.0*tp*pl+0.5);
     tp/=10;
     s=getchar();
    }
    }
    // cout<<"???"<<x<<" "<<op<<" "<<d<<endl;
    a=(a-8+op*x+24)%24;
    b=(b+op*d);
    if(b>=60)a++,b-=60;
    else if(b<0)a--,b+=60;
    a=(a+24)%24;
    printf("%02d:%02d\n",a,b);
  }
}