#include<fstream>
#include<string.h>
using namespace std;
ifstream in("text.in"); 
ofstream out("text.out"); 
char s[9999];
unsigned short i,p=0,k=0;  
int main ()
{
	in.getline(s,9999); 
	for(i=0;i<strlen(s);i++)
		if(s[i]<='z'&&s[i]>='a'||s[i]<='Z'&&s[i]>='A') 
			if(i==0)
			{ k=1;
				p++;
			} 
			else
			p++;	
		else
	    if(s[i+1]<='z'&&s[i+1]>='a'||s[i+1]>='A'&&s[i+1]<='Z') 
			k++;
					
out<<p/k; 
}