+sem => [
+ map {
+ local $_ = $_;
+ s/[1-4]\K(?=[4-9])/ /;
+ tr/1-9/↙←↖↑↗→↘↓/;
+ s{(.)(?=.)}{<span style="position:absolute">$1</span>}
+ or s/^/<span>/ and $_ .= '</span>';
+ $_
+ }
+ qw(
+ 1 2 3 4 5 6 7 21 31 46 14 15 16 17 23
+ 24 25 26 27 34 35 47 56 57 36 67
+ )
+],