#include <bits/stdc++.h>

using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
long long  nr,cuv;
char last, ch;
int main()
{
    fin.get(last);
    if(isalpha(last))nr++;
    while ( fin.get(ch))
    {
        //fout<<ch;
        if(isalpha(ch)==0&&isalpha(last))cuv++;
        else if(isalpha(ch))nr++;
        last=ch;
    }
    fout<<nr/cuv;
    return 0;
}