C1111233131211111211113313331333133313232321333133313113323221231221   >>    C111123313121111121111331333133313331323232133313331311332322123122   <<    C1111233131211111211113313331333133313232321333133313113323221231223   >>      C1111233131211111211113313331333133313232321333133313113323221231222   >>