#include <stdio.h> int main() { int h,m,k; scanf("%d:%d%d",&h,&m,&k); //scanf("%d:%d %d",&h,&m,&k); h=(h+(k+m)/60)%24;//k m对60取余 m=(m+k)%60; printf("%#02d:%#02d\n",h,m); return 0; }