%hash = ( (a => 1, b => 2), (a => 101, b => 102) );
%hash = ( (a => 1, b => 2), (b => 102, a => 101) );
%hash = ( (b => 2, a => 1), (a => 101, b => 102) );
%hash = ( (b => 2, a => 1), (b => 102, a => 101) );