#include<stdio.h>
#include<iostream>
using namespace std;

int main(){
    int h,m;
    int n; 
    cin>>n;
    for(int i = 0; i<n; i++){
        int hour = 13;
        int minute = 15;
        scanf("%d:%d",&h,&m);
        int ah,am;
        ah = hour+h;
        if(ah>=24){
            ah -= 24;
        } 
        am = minute+m;
        if(am>=60){
            am-=60;
            ah+=1;
        }
        printf("%d:%d\n",ah,am);
    }
    
}