#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
	FILE *f;
	f=fopen("text.in", "r");
	char c;
	int space_counter=1;
	int letter_counter=0;
	while(c!=EOF)
	{
		c=fgetc(f);
		if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
		{
			letter_counter++;
		}
		else
			if(c==' ')
			{
				space_counter++;
			}
	}
	f=fopen("text.out", "w");
	fprintf(f,"%d\n", (letter_counter/space_counter));
	
	return 0;
}