#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
    char x;
    int ok=0,lit=0,cuv=0;
    while(fin>>x)
    {
        if((x>='a'&& x<='z')||(x>='A' && x<='Z'))
        {
            lit++;
            if(ok==0){ok=1;cuv++;}
        }
        else ok=0;
    }
    fout<<lit/cuv;
    return 0;
}