#include<iostream.h>
#include<fstream.h>
#include<cctype>
int main()
{int i=1,s=1,n=0,p=0,l=0;
char a[10000];
ifstream f("text.in",ios::in);
ofstream g("text.out",ios::out);
while(f.get(a[i]))
	i++;
for(s=1;s<=i;s++)
	if(((a[s]>='a')&&(a[s]<='z'))||((a[s]>='A')&&(a[s]<='Z')))
		l++;
for(s=1;s<=i;s++)
	if(a[s]==' ')
		p++;
p=p+1;
s=l/p;
g<<s;
f.close();
g.close();


}