#include<stdio.h>
#include<io.h>
#include<stdlib.h>
#include<conio.h>
#include<string.h>
void main(void)
{
	FILE *f,*g;
	f=fopen("text.in", "r");
	g=fopen("text.out", "a");
		char x[20],b;
		int a,c,nr=0,s=0,i=0;
		
		 while(!(feof(f))
		 {
			 fscanf(f,"%c",&b);
			 x[i]=b;
			 i++;
		 }

		x[i]=NULL;
		i=0;
		c=strlen(x);
		while(i<c)

			{
				while(!(x[i]>='a'&&x[i]<='z'||x[i]>='A'&&x[i]<='Z'))
					i++;
				a=i;
				while(x[i]>='a'&&x[i]<='z'||x[i]>='A'&&x[i]<='Z')
					i++;
				s=s+i-a;
				nr++;
				i++;
			}
    fprintf(g,"%i",s/nr);
	fclose(f);
	fclose(g);
}