#include<stdio.h>
char c;
int n,st,nrc,nrl;
int main ()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    st=0;
    while(1)
    {
        c=0;
        scanf("%c",&c);
        if(!c)
            break;
        if(st==0 && ((c>='a' && c<='z') || (c>='A' && c<='Z')))
        {
            nrc++;
            st=1;
            nrl++;
        }
        else
           if(st==1)
           {
               if((c>='a' && c<='z') || (c>='A' && c<='Z'))
                   nrl++;
               else
                  st=0;
           }
    }
    printf("%d\n",nrl/nrc);
    return 0;
}