#include<fstream> 
using namespace std;  
ifstream f("text.in");
ofstream g("text.out");
char b,c;
int contor1,contor2,q;
int main(){
	while(f.get(c))
		{
			if (( c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z' ) )          
					contor1++;     
			else        
				if (( b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z' ) )
					contor2++;                         
			
				b=c;                 
		}                     
	g<<contor1/contor2;          

	return 0;
}