C11111211113313112113313331333133313331312322121111331333132211233121   >>    C1111121111331311211331333133313331333131232212111133133313221123312   <<    C11111211113313112113313331333133313331312322121111331333132211233123   >>      C11111211113313112113313331333133313331312322121111331333132211233122   >>