#include<iostream> using namespace std; int main(){ int h,m,s,s1; cin>>h>>m>>s>>s1; s=s+s1; m=m+s/60; s=s%60; h=h+m/60; m=m%60; h=h%24; if(h==0){ cout<<12<<":"<<m<<":"<<s<<"am"; }else if(h<12){ cout<<h<<":"<<m<<":"<<s<<"am"; }else if (h==12){ cout<<12<<":"<<m<<":"<<s<<"pm"; }else{ cout<<h-12<<":"<<m<<":"<<s<<"pm"; } return 0; }