#include <fstream.h>
int main()
{ char c;
int k=0,s=0,p=0;
ifstream f("text.in");
ofstream g("text.out");
while (f>>c) { g<<c;
    if (c==char(" ")) p++;
	else if (isalpha(c)) k++;  
	else {s+=k;k=0; }
}
g<<s/p;
f.close();
g.close();
return 0;
}