D12121212213231323132323323132322331323331323221211221123132311   >>    D1212121221323132313232332313232233132333132322121122112313231   <<    D12121212213231323132323323132322331323331323221211221123132313   >>      D12121212213231323132323323132322331323331323221211221123132312   >>