D12121323331322331311132313132313233313233313331313231213232321   >>    D1212132333132233131113231313231323331323331333131323121323232   <<    D12121323331322331311132313132313233313233313331313231213232323   >>      D12121323331322331311132313132313233313233313331313231213232322   >>