#include <cstdio>
#include <cctype>

using namespace std;
int nrlit,nrcuv;
char c;

bool ok=false;
int main ()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while (scanf("%c",&c)!=EOF)
    {
        if (isalpha(c))
        {
            nrlit++;
            if (!ok)
            {
                nrcuv++;
                ok=true;
            }
        }
        else ok=false;


    }

    printf("%d",nrlit/nrcuv);

    return 0;
}