C11111211113313112113313331333133313331333132212111133133313331333133323233121   >>    C1111121111331311211331333133313331333133313221211113313331333133313332323312   <<    C11111211113313112113313331333133313331333132212111133133313331333133323233123   >>      C11111211113313112113313331333133313331333132212111133133313331333133323233122   >>