p6 - literal hash

my $a = %( a => [ ${ b => "c" } ] );

say WHAT $a;        # Hash
say WHAT $a<a>;     # Array
say WHAT $a<a>[0];  # Hash

my $b = %( a => [ %( b => "c" ) ] );

say WHAT $b;        # Hash
say WHAT $b<a>;     # Array
say WHAT $b<a>[0];  # Pair