C1111233131211111211113313331333133313221211113313331333133313232213231311321   >>    C111123313121111121111331333133313331322121111331333133313331323221323131132   <<    C1111233131211111211113313331333133313221211113313331333133313232213231311323   >>      C1111233131211111211113313331333133313221211113313331333133313232213231311322   >>