#include<stdio.h>

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

char c;
long nrc,lt,bun;

int main() {
   while(fscanf(f,"%c",&c)==1) {
      if(c>='a' && c<='z' || c>='A' && c<='Z') {
	 lt++; bun=1;
      }
      else {
	 if(bun==1)  nrc++;
	 bun=0;
      }
      c=0;
   }
   fprintf(g,"%ld",lt/nrc);
   fclose(f);
   fclose(g);
   return 0;
}