C1111233131211111211113313331333133313232321333133313331333133112111112233221   >>    C111123313121111121111331333133313331323232133313331333133313311211111223322   <<    C1111233131211111211113313331333133313232321333133313331333133112111112233223   >>      C1111233131211111211113313331333133313232321333133313331333133112111112233222   >>