#include<stdio.h>
using namespace std;

int cuv,lit,k;//nr de cuvinte/nr de litere
char ch;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    lit=0;cuv=0;k=0;
    while(scanf("%c", &ch)!=EOF)
    {
        if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))
        {
            lit++;
            if(k==0)
            {
                cuv++;
                k=1;
            }
        }
        else
        {
            k=0;
        }
    }
    if(lit==0)printf("0");
    else printf("%d",lit/cuv);
    fclose(stdin);
    fclose(stdout);
    return 0;
}