#include <bits/stdc++.h>
#define tt typedf
#define jzl 1314
using namespace std;
tt int ii;
tt char cc;
tt string st;
tt longlong ll;
tt flort ff;
tt hour,minute,second;
char ans;
int main(){
	cin>>hour>>minute>>second>>ans;
	ii tot=hour*3600+minute*60+second;
	if(ans='P'){
		tot+=12*3600;
	}
	cout<<tot<<endl;
	return 0;
}