C312312111133131212111133133313331333133112113313331333133313113313231323232321   >>    C31231211113313121211113313331333133313311211331333133313331311331323132323232   <<    C312312111133131212111133133313331333133112113313331333133313113313231323232323   >>      C312312111133131212111133133313331333133112113313331333133313113313231323232322   >>