#include <iostream>

int main(void) {
	FILE *f;
	f = fopen("text.in","r");
	freopen("text.out","w",stdout);
	char x;
	bool szo;
	int db1,db2;
	db1=db2=0;
	szo=false;
	while (!feof(f)) {
		fscanf(f,"%c",&x);
		if ((x>='a' && x<='z') || (x>='A' && x<='Z')) {szo=true; db1+=1;}
		else if (szo) {szo=false;db2+=1;}
	}
	printf("%d",(int)(db1/db2));
}