#include <iostream>

using namespace std;

int main() {
    int n;
    while (scanf("%d", &n) != EOF) {
        for (int i = 0; i < n; i++) {
            int h, m, sum = 0;
            int ans_h = 13, ans_m = 15;
            scanf("%d:%d", &h, &m);
            sum = h * 60 + m;//将成熟时间统一成分钟
            for (int j = 0; j < sum; j++) {
                ans_m++;
                if (ans_m >= 60) {//分钟超过，增加小时
                    ans_h++;
                    ans_m = 0;
                    if (ans_h >= 24) {//小时超过，置零
                        ans_h = 0;
                    }
                }
            }
            printf("%d:%d\n", ans_h, ans_m);
        }
    }
    return 0;
}