#include <fstream.h>

ifstream fin ("text.in");
ofstream fout ("text.out");

char a[100000];

int main()

{
	int i, cuvant=1;
	char c;
	i=0;
	fin.get(c);
	while (c!='\n' && c!='?' && c!='!')
	{
		if (c==' ')
			cuvant++;
		else
			if (c!='-' && c!=',' && c!='.')
				a[i++]=c;
		fin.get(c);
	}
	fout<<strlen(a)/cuvant;
	fin.close();
	fout.close();
	return 0;
}