#include<bits/stdc++.h>

using namespace std;

int main()

{

freopen("time.in","r",stdin);

freopen("time.out","w",stdout);

int h,m,s,shu;

scanf("The Starting Time is %d:%d:%d./n", &h, &m, &s);

scanf("%d",&shu);

s=s+shu; //秒

m=s/60+m;//超的分

s=s%60;

h=(m/60+h)%24;//小时

m=m%60; // 分

cout<<h<<":"<<m<<":"<<s<<endl;

return 0;

}