+my %uc = (
+ (map { (uc $_ => uc $rows{$_}) } grep {
+ !defined $rows{uc $_}
+ } keys %rows),
+ '|' => '€',
+ 'M' => 'Ú',
+ '+' => 'Ø',
+);
+
+my $groups = kbchars({%rows, %uc});
+$groups->{def}{''}{$_}[0] .= ' ext' for keys %uc;
+$groups->{flag}{ext} = ['anachrone', 'expected uppercase variants if allowed by charset'];
+