C11112331312111112111133133313331333133313331333133313331211111233221   >>    C1111233131211111211113313331333133313331333133313331333121111123322   <<    C11112331312111112111133133313331333133313331333133313331211111233223   >>      C11112331312111112111133133313331333133313331333133313331211111233222   >>