C11112331312111112111133133313331333133313331333133313311211111211232321   >>    C1111233131211111211113313331333133313331333133313331331121111121123232   <<    C11112331312111112111133133313331333133313331333133313311211111211232323   >>      C11112331312111112111133133313331333133313331333133313311211111211232322   >>