#include<bits/stdc++.h> using namespace std; int main() { int n; string a[7]; cin>>n; for(int i=1;i<=n;i++) { cin>>a[i]; } for(int i=1;i<=n;i++) {
if(a[i]=='A'||a[i]=='B'||a[i]=='C'||a[i]=='D'||a[i]=='F'||a[i]=='G'||a[i]=='R'||a[i]=='S'||a[i]=='T')
{
n--;
}
} cout<<n; return 0; }