Help for this page
sub subdivide { my ($s, $n) = @_ ; ... print subdivide("Over 6789012+Once\n", 12) ; print subdivide("Over 6789012+Once Edge 2\n", 12) ; print subdivide("Over 6789012+Once6789012+Twice\n", 12) ;
trivial Edge 6789012 ... Over 6789012 +Once6789012 +Twice