D11222112113313133313232211233132333132313231121133132323221121   >>    D1122211211331313331323221123313233313231323112113313232322112   <<    D11222112113313133313232211233132333132313231121133132323221123   >>      D11222112113313133313232211233132333132313231121133132323221122   >>