#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;
    string s;
    int ab=0,a=0,b=0,c=0;
    for(int o=0;o<n;o++)
    {
        cin >> s;
        if(s[0]=='B'&&s[s.size()-1]=='A') c++;
        else if(s[0]=='B') b++;
        else if(s[s.size()-1]=='A') a++;
        for(int i=0;i<(int)s.size()-1;i++) if(s[i]=='A'&&s[i+1]=='B') ab++;
    }
    if(min(a,b)>0) cout << ab+min(a,b)+c << endl;
    else if(max(a,b)>0) cout << ab+c << endl;
    else cout << ab+max(0,c-1) << endl;
    return 0;
}
