#include <cstdio>
using namespace std;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    char c,d;
    int nrcuv=0,nrch=0,pp=1;
    d=getchar();
    if((d>='a' && d<='z') || (d>='A' && d<='Z')){
      nrcuv++;
      nrch++;
    }
    while(pp)
    {
      c=getchar();
      if((c>='a' && c<='z') || (c>='A' && c<='Z'))
      {
        if(!((d>='a' && d<='z') || (d>='A' && d<='Z')))
          nrcuv++;
        nrch++;
      }
      else{
        if(c==EOF || c=='\n')
          pp=0;

      }
      d=c;
    }
    printf("%d",nrch/nrcuv);
    return 0;
}