#include <bits/stdc++.h>

using namespace std;
ifstream f("date.in");
ofstream g("date.out");
int main()
{
    char c[255];
    int n,p=0,k=0,ok=0,i;
    f.getline(c, 255);
    n=strlen(c);
    for(i=0; i<n; i++)
    {
        if(isalpha(c[i]))
    {
        p++;
        ok=1;
    }
    else
        if(ok==1 && isspace(c[i]))
    {
        k++;
        ok=0;
    }
    }
g<<p/k;

return 0;
}