using namespace std;
int main (){
    freopen("time.in", "r", stdin);
    freopen("time.out", "w", stdout);
    int h,m,s;
    int n;
    scanf("The Starting Time is %d:%d:%d.",&h,&m,&s);
    cin >> n;
    s = s + n;
    while(s >= 60){
        s -= 60;
        m++;
    }
    while(m >= 60){
        m -= 60;
        h++;
    }
    while(h >= 24){
        h -= 24;
    }
    printf("%d:%d:%d",h,m,s);
    return 0;
}