#include <stdio.h>
int main()
{
	FILE *f = fopen ("text.in", "r") ;
	FILE *g = fopen ("text.out", "w") ;
	char x;
	int cuvinte = 0;
	int litere = 0;
	while ((x = fgetc(f)) != EOF)
	{
		if(x >= 'a' && x <= 'z' || x >= 'A' && x <= 'Z')
		{
			cuvinte++;
			while (x >=  'a' && x <= 'z' || x >= 'A' && x <= 'Z')
			{
				litere++;
				x = fgetc(f);
			}
		}
	}
	fprintf (g, "%d", litere / cuvinte);
	fclose(f);
	fclose(g);
	return 0;
}