#include<bits/stdc++.h> using namespace std; struct time{ int hh; int mm; int ss; }; int main(){ struct time clock; scanf("%d:%d:%d",&clock.hh,&clock.mm,&clock.ss); int n; scanf("%d",&n); clock.ss=clock.ss+n; if(clock.ss>=60){ clock.ss=clock.ss-60; clock.mm++; if(clock.mm>=60){ clock.mm=clock.mm-60; clock.hh++; if(clock.hh==24){ clock.hh=0; } } } printf("%02d:%02d:%02d",clock.hh,clock.mm,clock.ss); return 0; }