#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm> 
#include<string>
#include<cstring>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int hour = 13, minute = 15;
    int a, b, t1, t2;
    for (int i = 0; i < n; i++) {
        scanf("%d:%d", &a, &b);
        t2 = (minute + b) % 60;
        if ((minute + b) >= 60) {
            t1 = (hour + a + 1) % 24;
        }
        else t1 = (hour + a) % 24;
        printf("%d:%d\n", t1, t2);
    }
    return 0;
}