#include<bits/stdc++.h>
using namespace std;
int a,b,c;char x;
int main(){
	cin>>a>>b>>c>>x;
	if(x=='A'){
		cout<<43200-(12-a)*(60-b)*(60-c)<<endl;
		return 0;
	}if(x=='P'){
		cout<<86400-(12-a)*(60-b)*(60-c)<<endl;
		return 0;
	}return 0;
}

错了？？？？？