#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");

char s[140000];
int n, l, ok, cuv;

int main()
{
    f.getline(s, 140001);
    for(int i=0; i<=strlen(s); i++){
        if((s[i] <= 'z' && s[i] >= 'a') || (s[i] <= 'Z' && s[i] >='A')){
            ok = 1;
            l++;
        }else{
            if(ok == 1) cuv ++;
            ok = 0;
        }
    }

    g<<l/cuv<<'\n';

    return 0;
}