#include <bits/stdc++.h>
using namespace std;
ifstream f("date.in");
ofstream g("date.out");
int main()
{
    char x[300];
    int nr=0,nrl=0,p=0,n,i;
    f.get(x,300);
    n=strlen(x);
    for(i=1;i<=n;i++)
    {
        if(isalpha(x[i]))
        {
            nr++;
            p=1;
        }
        else
        {if(p==1)
        {
            p=0;
        }    nrl++;
        }
    }
    g<<nr/nrl;
    return 0;
}