Splinters

void and 7-9 HC is shown via standard splinter  1M -3♠/4m/♥

singleton and 7-9 HC is shown via Bergen Modified    ➲

void and singleton 10-12 is shown ambigously:

1♥ - 3♦ - 3♥ -    ➲

1♠ - 3♥ - 3♠ -    ➲