#include <bits/stdc++.h>

using namespace std;

char ch[1000999];

int words,no;

int main()
{
    ifstream fin ("text.in");
    ofstream fout ("text.out");
    fin.getline(ch,1000099);
    int n=strlen(ch);
    for (int i=0;i<n;++i)
    {
        if (isalpha(ch[i]))
        {
            words++;
            while (isalpha(ch[i]) && i<n)
            {
                no++;
                ++i;
            }
        }
    }
    fout<<no/words<<"\n";
    return 0;
}