C11112331312111112111133133313331333133313132211312111113331333132233223213221   >>    C1111233131211111211113313331333133313331313221131211111333133313223322321322   <<    C11112331312111112111133133313331333133313132211312111113331333132233223213223   >>      C11112331312111112111133133313331333133313132211312111113331333132233223213222   >>