C11111211113313112113313331333133313231311331333121211113313232132322321   >>    C1111121111331311211331333133313331323131133133312121111331323213232232   <<    C11111211113313112113313331333133313231311331333121211113313232132322323   >>      C11111211113313112113313331333133313231311331333121211113313232132322322   >>