#include<bits/stdc++.h>
using namespace std;

int main(){
	int h,m,s;
	char t;
	cin>>h>>m>>s>>t;
	if(t=='A'){
		cout<<h*60*60+m*60+s;
	}
	else{
		cout<<12*60*60+h*60+m*60+s;
	}
    return 0;
}