C1111233131211111211113313331333131211111211111333133313331333133313223111221   >>    C111123313121111121111331333133313121111121111133313331333133313331322311122   <<    C1111233131211111211113313331333131211111211111333133313331333133313223111223   >>      C1111233131211111211113313331333131211111211111333133313331333133313223111222   >>