C11111211113313112113313331333133313133313232233133313113313112211232311331   >>    C1111121111331311211331333133313331313331323223313331311331311221123231133   <<    C11111211113313112113313331333133313133313232233133313113313112211232311333   >>      C11111211113313112113313331333133313133313232233133313113313112211232311332   >>