D2122132313112331311221123133313232213331313331323221123313231333132212312121   >>    D212213231311233131122112313331323221333131333132322112331323133313221231212   <<    D2122132313112331311221123133313232213331313331323221123313231333132212312123   >>      D2122132313112331311221123133313232213331313331323221123313231333132212312122   >>