C312312111133131121333133313113313331333133313331133133313222321   >>    C31231211113313112133313331311331333133313331333113313331322232   <<    C312312111133131121333133313113313331333133313331133133313222323   >>      C312312111133131121333133313113313331333133313331133133313222322   >>