#include<stdio.h>
#include<string.h>
char x,y;
int cuv,lit,ok;
int main(){
	FILE * f = fopen("text.in","r");
	FILE * g = fopen("text.out","w");
	while(fscanf(f,"%c",&x)!=EOF){
		if(('a'<=x&& x<='z')||('A'<=x && x<='Z')){
			lit++;
			ok=1;
		}
		else{
			if(ok==1)
				cuv++;
			ok=0;
		}
		y=x;
	}
	if(('a'<=x&& x<='z')||('A'<=x && x<='Z'))
		cuv++;
	fprintf(g,"%d",lit/cuv);
	fclose(f);
	fclose(g);
	return 0;
}