#include <stdio.h>
#include <string.h>
int n,i,lg,cuv,ok;
char c[10240];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(c);
    n=strlen(c);
    for(i=0; i<=n; i++)
     if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z'))
     {
         for(ok=1; ok;)
          if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z'))
          {
              lg++;
              i++;
          }
          else ok=0,cuv++;
     }
     printf("%d",lg/cuv);
     return 0;
}