#include<bits/stdc++.h>
using namespace std;
int main(){
int Y, Z;
cin >> Y >> Z;
if(Y<=6 && 30<=Z && Z<=39){
cout << 0 << Y+3 << ":0" << Z-30 <<endl;
}
else if(7<=Y && Y<=20 && 30<=Z && Z<=39){
cout << Y+3 << ":0" << Z-30 <<endl;
}
else if(21<=Y && Y<=23 && 30<=Z && Z<=39){
cout << 0 << Y-21 << ":0" << Z-30 <<endl;
}
else if(Y<=6 && 40<=Z && Z<=59){
cout << 0 << Y+3 << ":" << Z-30 <<endl;
}
else if(7<=Y && Y<=20 && 40<=Z && Z<=59){
cout << Y+3 << ":" << Z-30 <<endl;
}
else if(21<=Y && Y<=23 && 40<=Z && Z<=59){
cout << 0<< Y-21 << ":" << Z-30 <<endl;
}
else if(Y<=7 && 0<=Z && Z<=29){
cout << 0 << Y+2 << ":" << Z+30 <<endl;
}
else if(8<=Y && Y<=21 && 0<=Z && Z<=29){
cout << Y+2 << ":" << Z+30 <<endl;
}
else{
cout << 0 << Y-22 << ":" << Z+30 <<endl;
}
return 0;
}