#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
   int a,b,c;
    char m;
    string n;
    cin>>a>>m>>b>>m>>c;
   cin>>n;
    if(n[0] == 'A')
        {if(a<10)
            cout<<"0"<<a<<":";
         else if(a==12)
             cout<<"00"<<":";
         else
             cout<<a<<":";
   if(b<10)
            cout<<0<<b<<":";
         else
             cout<<b<<":";
         if(c<10)
            cout<<0<<c;
         else
             cout<<c;
        }
    else
        {
        if(a<12)
             cout<<a+12<<":";
        else
            cout<<"12"<<":";
   if(b<10)
            cout<<0<<b<<":";
         else
             cout<<b<<":";
         if(c<10)
            cout<<0<<c;
         else
             cout<<c;
        }


    }