C11112331312111112111133133313331333133313331333112211211113313331323132313221   >>    C1111233131211111211113313331333133313331333133311221121111331333132313231322   <<    C11112331312111112111133133313331333133313331333112211211113313331323132313223   >>      C11112331312111112111133133313331333133313331333112211211113313331323132313222   >>