#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
int main()
{
FILE *f,*g;
char s[41];
int i,c,n;
f=fopen("text.in","r");
g=fopen("text.out","w");
fgets(s,f);
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++;
n=c/n;
fprintf(f,"%d",n);
fclose(f);
fclose(g);
return 0;