C22212323232133313113313331333133313113313121223323231333212221   >>    C2221232323213331311331333133313331311331312122332323133321222   <<    C22212323232133313113313331333133313113313121223323231333212223   >>      C22212323232133313113313331333133313113313121223323231333212222   >>