#include <bits/stdc++.h>
using namespace std;
int main(){
    int sh,f,m;
    char c;
    cin >> sh >>f >>m >>c;
    if(c=='P'){
	if(sh!=0) cout<<(sh+12)*3600+f*60+m;
	else cout<<0;
    }else if(c=='A'){
    if(sh!=0) cout <<sh*360+f*60+m;
    else cout <<0;
    }
    return 0;
}