#include<iostream.h>
#include<string.h>
#include<fstream.h>
int main()
{long k=0,z=-1,i;
char a[100],b[100]; 
*b=NULL;
ifstream f("text.in");
ofstream g("text.out");
while(!f.eof())
		{f>>a;
		strcat(b," ");
	for(i=0;i<strlen(a);i++)		
		if(isalpha(a[i]))
			{k++;
		strncat(b,a+i,1);}
		else
if(a[i]=='-'&&isalpha(a[i-1])&&isalpha(a[i+1]))			
		strcat(b," ");}
for(i=0;i<strlen(b);i++)
	if(isspace(b[i]))
		z++;
	g<<k/z;	
	return 0;}