#include <algorithm>
#include <cstdio>
#include <deque>
#include <iostream>
#include <string.h>
#include <cctype>

using namespace std;

char s[1050000];

int main()
{
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);
    cin.getline(s, 1050000);
    int x=strlen(s), cuv=0;
    int lit=x;
    for(int i=0; i<x; i++)
    {
        if(!isalpha(s[i])) {
            lit--;
        }
        else{
            if(i==0 || !isalpha(s[i-1]))
                cuv++;
        }
    }
    cout<<lit/cuv;
    return 0;
}