#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    char c;
    int i=0,d=0;
    unsigned long long l=0,nc=0;
    while(fin.get(c)){
        if((c-'a'>=0&&c-'a'<=25)||(c-'A'>=0&&c-'A'<=25)){
            l++;
            d=1;
        }
        else{
            if(d==1){
                nc++;
            }
            d=0;
        }
    }
    fout<<l/nc;
    return 0;
}