D132312121111331313231232313232233132313331313223313231323221211   >>    D13231212111133131323123231323223313231333131322331323132322121   <<    D132312121111331313231232313232233132313331313223313231323221213   >>      D132312121111331313231232313232233132313331313223313231323221212   >>