#include<iostream>
#include<fstream>
#include<string.h>
int main()
{
ifstream fin("text.in");
ofstream fout("text.out");
char s[41];
int i,c,n;
fin>>s;
c=0;
n=0;
for(i=0;i<strlen(s);i++)
	if(((s[i]>='a' && s[i]<='z') || (s[i]>='A' && s[i]<='Z')) && ((s[i-1]<'a' || s[i-1]>'z') && (s[i-1]<'A' || s[i-1]>'Z')))
	{
		n++;
		c++;
	}
	else if((s[i]>='a' && s[i]<='z') || (s[i]>='A' && s[i]<='Z'))
		c++;
fout<<c/n<<endl;
}