C11111211113313112113313331333133313231311331333133312111133121322331333223121   >>    C1111121111331311211331333133313331323131133133313331211113312132233133322312   <<    C11111211113313112113313331333133313231311331333133312111133121322331333223123   >>      C11111211113313112113313331333133313231311331333133312111133121322331333223122   >>