#include<cstdio>
#include<cmath>
#include<cstring>
using namespace std;
int sem;

int main (){
    char c;
    int dimensiune =0 , nrcuv =0 ;
    freopen ("text.in" , "r" , stdin);
    freopen ("text.out", "w" ,stdout);

    while (scanf("%c" ,&c)!=EOF)
    {
        if ((c>='a'&&c<='z') || (c>='A'&&c<='Z'))
        {
            dimensiune++;
            sem=1;
        }
        else if (sem){
            sem=0;
            nrcuv++;
        }

    }
if (!nrcuv) nrcuv++;

    printf ("%d" , (int)floor(dimensiune/nrcuv));
    return 0;
}