C11112331312111112111133133313331333133313331333133313331211113313231133232321   >>    C1111233131211111211113313331333133313331333133313331333121111331323113323232   <<    C11112331312111112111133133313331333133313331333133313331211113313231133232323   >>      C11112331312111112111133133313331333133313331333133313331211113313231133232322   >>