C312312111133131121333133313113313331333133313331333121111331323232211   >>    C31231211113313112133313331311331333133313331333133312111133132323221   <<    C312312111133131121333133313113313331333133313331333121111331323232213   >>      C312312111133131121333133313113313331333133313331333121111331323232212   >>