#include <bits/stdc++.h>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char c;
int lg,cuv;
bool ok;
int main()
{
    while(fin.get(c)){
        if(('a'<=c and c<='z') or ('A'<=c and c<='Z')){
            if(ok==0) cuv++;
            ok=1;
            lg++;
        } else ok=0;
    }
    fout << lg/cuv;
    return 0;
}