n=gets.to_i;puts ([[3,n-3],[5,n-5]].find{|x,y|(y&y-1)>0}||[-1])*' '
__END__
h={};[*0..64].map{|i|h[1<<i]=1}
n=gets.to_i
3.step(999,2){|i|
	if i<=n-i&&(n-i & n-i-1)>0
		puts [i,n-i]*' '
		exit
	end
}
p -1