#include <fstream.h>

using namespace std;

#define IN "text.in"
#define OUT "text.out"

int main()
{
	int nr,l,prim;
	char ch;
	
	FILE * f, *g;

	f = fopen (IN,"r");
	g = fopen (OUT,"w+");
	
	
	prim=1;
	nr=0; l=0;
	while (fscanf (f, "%c", &ch)!=EOF)
	{
		if (ch >='a' && ch<='z' || ch >='A' && ch<='Z')
		{
			if (prim==1)
				nr++;
			l++;
			prim=0;
		}
		else
			prim=1;
	}
	
	fprintf(g,"%d",(l/nr));
	
	fclose(f);
	fclose(g);
	return 0;
}