#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	int n,p=0;
	cin>>s;
	for(int i=0;i<n;i++){
		cin>>s[i];
		if(s[1]!='A'&&s[1]!='B'&&s[1]!='C'&&s[1]!='D'&&s[1]!='E'&&s[1]!='F'&&s[1]!='G'&&s[1]!='R'&&s[1]!='S'&&s[1]!='T'){
			p=p+1;
		}
	}
	cout<<p;
	return 0;
}

/**************************************************************
	Problem: 1181
	User: linyuhang
	Language: C++
	Result: Wrong Answer
****************************************************************/