#include<iostream>
#include <fstream>

using namespace std;
ifstream filein("text.in");
ofstream fileout("text.out");
 
main()
{
    int l=0,k=0;
    char s,last;
    last=0;
    while(filein.get(s))
         {
        if( (s>='A' && s<='Z')   ||  (s>='a' && s<='z') ) 
		          l++;
        else 
		   if( ((last>='A' && last<='Z') || (last>='a' && last<='z')) )  
		         k++;
        last=s;
         }
    fileout<<(l/k)<<"\n";

}