#include <stdio.h>

char ch;
int car,cuv;
int main(){
  FILE *f = fopen("text.in","r");
  int chr = 0;
  while(fscanf(f,"%c", &ch)!=EOF) {
    if (((ch>='a')&&(ch<='z'))||((ch>='A')&&(ch<='Z'))) {
      car++;
      if (chr==0) cuv++;
      chr=1;
    } else {
      chr=0;
    }
  }
  fclose(f);

  FILE *g = fopen("text.out","w");
  fprintf(g,"%d",car/cuv);
  fclose(g);
  return 0;
}