C11111211113313112113313331333133313231311331333121211113313232132321   >>    C1111121111331311211331333133313331323131133133312121111331323213232   <<    C11111211113313112113313331333133313231311331333121211113313232132323   >>      C11111211113313112113313331333133313231311331333121211113313232132322   >>