#include<fstream> 
#include<cstring> 

using namespace std; 
ifstream f("text.in"); 
ofstream g("text.out"); 
int len,cuv,rez,sep; 
char ch; 

int main () 
{  
	f.get(ch);     
	while(!f.eof())        
		{ 
			if((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') )                 
				{ 
					len++;                     
					if(!sep)                         
						cuv++;                     
					sep = 1;                
				}                
				else                
				sep = 0;            
			f.get(ch);         
		}     
	rez = len / cuv;     
	g << rez << '\n';     
	f.close();     
	g.close();     
	return 0; 
}