D11221123122332313123231323223313232233133313232313231323221211   >>    D1122112312233231312323132322331323223313331323231323132322121   <<    D11221123122332313123231323223313232233133313232313231323221213   >>      D11221123122332313123231323223313232233133313232313231323221212   >>