D212213231311233131122112313331323221333131333132322112331323133313223313122311   >>    D21221323131123313112211231333132322133313133313232211233132313331322331312231   <<    D212213231311233131122112313331323221333131333132322112331323133313223313122313   >>      D212213231311233131122112313331323221333131333132322112331323133313223313122312   >>