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