C11111211113313112113313331333133313331312322121111133313221233121   >>    C1111121111331311211331333133313331333131232212111113331322123312   <<    C11111211113313112113313331333133313331312322121111133313221233123   >>      C11111211113313112113313331333133313331312322121111133313221233122   >>