#include<stdio.h>
#include<string.h>
char c;int n,st,nrc,nrl;
int main ()
{
    int i;
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    st=0;
    while(scanf("%c",&c)!=EOF)
    {
        if(c=='\n')
            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",nrl/nrc);
    return 0;
}