C11112331312111112111133133313331333133311222121111113313232332313221   >>    C1111233131211111211113313331333133313331122212111111331323233231322   <<    C11112331312111112111133133313331333133311222121111113313232332313223   >>      C11112331312111112111133133313331333133311222121111113313232332313222   >>