C11112331312111112111133133313331333133313331333133313331211113313231332211   >>    C1111233131211111211113313331333133313331333133313331333121111331323133221   <<    C11112331312111112111133133313331333133313331333133313331211113313231332213   >>      C11112331312111112111133133313331333133313331333133313331211113313231332212   >>