D11221123122332313123231323223313113313231323232213231323132313232211   >>    D1122112312233231312323132322331311331323132323221323132313231323221   <<    D11221123122332313123231323223313113313231323232213231323132313232213   >>      D11221123122332313123231323223313113313231323232213231323132313232212   >>