#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	char p;
	cin>>a>>b>>c>>p;
	if(p=='A'){
		cout<<a*3600+b*60+c;
	}
	else if(p=='P'){
		cout<<43200+a*3600+b*60+c;
	}
    return 0;
}