#include<fstream>
#include<string>
#include<ctype.h>
using namespace std;

ifstream fin ("text.in");
ofstream fout ("text.out");

int main(){
	char s[1001000],d=26;
	int cv=0,i,slit=0,lit=0,n;
	
	fin.get(s,1000999,d);
	n=strlen(s);
	if(isalpha(s[0])){
		slit++;
		cv++;
	}
	for(i=1;i<n;i++)
		if(isalpha(s[i])){
			slit++;
			if(!isalpha(s[i-1])){
				cv++;
			}
		}
	if(cv==0) fout<<0;
	else fout<<slit/cv;
}