C22212323232133313113313331333132313331323133313331213132323123211111   >>    C2221232323213331311331333133313231333132313331333121313232312321111   <<    C22212323232133313113313331333132313331323133313331213132323123211113   >>      C22212323232133313113313331333132313331323133313331213132323123211112   >>