#include<iostream>
#include<iomanip>
using namespace std;
int main(){
    int a,b,c;
    char d;
    cin>>a>>b>>c>>d;
    if(int(d) == int('A')){
        c = c + a * 3600;
        c = c + b * 60;
    }else{
        c = c + a * 3600;
        c = c + b * 60;
        c = c + 3600 * 12;
    }
    cout<<c;
}