C22212323232133313113313331333132313331323133313331213132323213122221   >>    C2221232323213331311331333133313231333132313331333121313232321312222   <<    C22212323232133313113313331333132313331323133313331213132323213122223   >>      C22212323232133313113313331333132313331323133313331213132323213122222   >>