#include<iostream>
#include<string.h>
#include<fstream>
using namespace std;
int main()
{char a[80],b[]=" ";
int i,nrl=0,nrc=0,c,k,y;
ifstream f1("text.in");
ofstream f2("text.out");
f1.get(a,50);
for(i=0;i<strlen(a);i++)
	if(((a[i]>='a')&&(a[i]<='z'))||((a[i]>='A')&&(a[i]<='Z')))
		nrl++;
i=0;
while((a[i]!=' ')&&(a[i]!=strlen(a)))
	i++;
if(strchr(b,a[i-1])==0)
	nrc++;
for(k=i+1;k<strlen(a);k++)
	{c=k;
	while((a[k]!=' ')&&(k!=strlen(a)))
		k++;
	if(strchr(b,a[k-1])==0)
		nrc++;}
y=nrl/nrc;
f2<<y;
f1.close();
f2.close();
return 0;}