using namespace std;
#include<fstream>
#include<stdio.h>
char s;
int contor, nrcuv,k;
FILE *fin=fopen("text.in","r");
FILE *fout=fopen("text.out","w");   

//ifstream fout("text.out");
int main()
{
  //ifstream fin("text.in");
  //ofstream fout("text.out");
  k=0;
  while(fscanf(fin,"%c",&s)!=EOF)
  {
    //fin.get(s,2);
    if((s>='A'&&s<='Z')||(s>='a'&&s<='z')) {contor++; if(k==0) nrcuv++;  
        else; k=1;
        }
    else k=0;
      /*else if(((s[0]<'A')||(s[0]>'Z'&& s[0]<'a')||(s[0]>'z'))&&
              ((p[0]>='A'&&p[0]<='Z')||(p[0]>='a'&&p[0]<='z')||(p[0]>='0'&&p[0]<='9'))) nrcuv++;*/
    //p[0]=s[0];
  }
  //fout<<contor<<" "<<nrcuv<<" "<<contor/nrcuv<<"\n";
  int p=contor/nrcuv;
  fprintf(fout,"%d",p);
  fclose(fin);
  fclose(fout);
  return 0;
}