#include <fstream>
#include <string>
using namespace std;

int main ()
{
	ifstream in ("text.in");
	ofstream out ("text.out");
	char v[100];
	int l=0, c=0, ok=0;
	in.getline(v,sizeof(v));
	for(int i=0; i<strlen(v) ;i++){
		if((v[i]>='a'&&v[i]<='z')||(v[i]>='A'&&v[i]<='Z')){
			if(ok==0){
				ok++;
				c++;}
			l++;}
		else
			ok=0;}
	out<<l/c;
	return 0;
}