#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main()
{
	char a[1004];int i,nr=0,s=0,l;bool k=0;
	freopen("text.in","r",stdin);freopen("text.out","w",stdout);
	cin.get(a,1004);
	l=strlen(a);
	for(i=0;i<l;i++)
		if(isalpha(a[i]))
		{
			if(k==0)
				nr++,k=1;
			s++;
		}
		else
			k=0;
	if(nr)
	    cout<<s/nr;
	else
		cout<<0;
	
}