#include<fstream.h>
#include<string.h>
#include<math.h>
#include<ctype.h>
int main (){
	int i,cuv=0,l=0,r;
	char s[300];
	ifstream in ("text.in");
	ofstream out ("text.out");
	in.get (s,300);
	for (i=0;i<strlen(s);i++)
		if (isalpha(s[i]))
			l++;
	for (i=0;i<strlen(s);i++)
		if (isalpha(s[i]))
			if (isalpha(s[i+1])<=0)
                        	cuv++;

	r=floor(l/cuv) ;
	out<<r;
	return 0;
	}