#include<stdio.h>
int main()
{char c;
 int k,k1,n;

 FILE *f=fopen("text.in","r");
 FILE *g=fopen("text.out","w");

 k1=k=0;


 while(!feof(f))
 {fscanf(f,"%c",&c);

  if((c>='a')&&(c<='z')) k++;
  else {if((c>='A')&&(c<='Z')) k++;
        else if(c==' ') k1++;}

  }

  k1+=2;

  n=k/k1;

 fprintf(g,"%d\n",n);
 
 fclose(f);
 fclose(g);
 return 0;
 }