#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,b,c;
	cin>>a>>b>>c;
	char d;
	cin>>d;
	if(d=='P')
	{
		a=a+12;
	}
	int z=3600*a+60*b+c;
	cout<<z;
	return 0; 
}