C11111211113313112113313331333133313331333211321133132332323221   >>    C1111121111331311211331333133313331333133321132113313233232322   <<    C11111211113313112113313331333133313331333211321133132332323223   >>      C11111211113313112113313331333133313331333211321133132332323222   >>