D11221123122332313123231323223313113313231323113313233313232211   >>    D1122112312233231312323132322331311331323132311331323331323221   <<    D11221123122332313123231323223313113313231323113313233313232213   >>      D11221123122332313123231323223313113313231323113313233313232212   >>