#include <stdio.h>

typedef struct {
    int hour;
    int min;
    int sec;
} Time;

void read_time(Time *t) {
    scanf("%d %d %d", &t->hour, &t->min, &t->sec);
}

void display_time(Time t) {
    printf("%02d:%02d:%02d\n", t.hour, t.min, t.sec);
}

Time add_time(Time t1, Time t2) {
    Time result;
    result.sec = t1.sec + t2.sec;
    result.min = t1.min + t2.min + result.sec / 60;
    result.sec %= 60;
    result.hour = t1.hour + t2.hour + result.min / 60;
    result.min %= 60;
    result.hour %= 24;
    return result;
}

Time diff_time(Time t1, Time t2) {
    Time result;
    int total_sec1 = t1.hour * 3600 + t1.min * 60 + t1.sec;
    int total_sec2 = t2.hour * 3600 + t2.min * 60 + t2.sec;
    int diff_sec = total_sec1 - total_sec2;

    if (diff_sec < 0) {
        diff_sec += 24 * 3600;
    }

    result.hour = diff_sec / 3600;
    result.min = (diff_sec % 3600) / 60;
    result.sec = diff_sec % 60;
    return result;
}

int main() {
    Time t1, t2, sum, difference;

    printf("Enter the first time (hours minutes seconds): ");
    read_time(&t1);

    printf("Enter the second time (hours minutes seconds): ");
    read_time(&t2);

    printf("First time: ");
    display_time(t1);

    printf("Second time: ");
    display_time(t2);

    sum = add_time(t1, t2);
    printf("Sum of times: ");
    display_time(sum);

    difference = diff_time(t1, t2);
    printf("Difference between times: ");
    display_time(difference);

    return 0;
}