C213211331333131212111133133313231333132313331322331323132323221   >>    C21321133133313121211113313331323133313231333132233132313232322   <<    C213211331333131212111133133313231333132313331322331323132323223   >>      C213211331333131212111133133313231333132313331322331323132323222   >>