#include<cstring>
#include<vector>
#include<fstream>
using namespace std;

ifstream in;
ofsrteam out;

int main()
{
	in.open("text.in");
	out.open("text.out");
	char chr;
	int some=0,ascii;
	int lenght=0,nr=0;
	while(in>>chr)
	{
		ascii=chr;
		if((ascii>=97&&ascii<=122) || (ascii>=65&&ascii<=90)
		{
			lenght++;
			some=1;
		}
		else
		{
			if(some)
				nr++;
			some=0;
		}
	}
	out<<lenght/nr;
	in.close();
	out.close();
	return 0;
}