C312312111133131121333133313113313331333133313331333133313331333132313231231211   >>    C31231211113313112133313331311331333133313331333133313331333133313231323123121   <<    C312312111133131121333133313113313331333133313331333133313331333132313231231213   >>      C312312111133131121333133313113313331333133313331333133313331333132313231231212   >>