#include <bits/stdc++.h>

using namespace std;
ifstream in("text.in");
ofstream out("text.out");
char x;
int nr,cuv,nrc;
int main()
{
    while(in.get(x))
    {
        if(isalpha(x)) {
            nr++;
            if(cuv==1)
            {
                nrc++;
                cuv=0;
            }
        }
        else cuv=1;
    }
    out<<nr/nrc;
    return 0;
}