C31231211111133131211113313331333133313332233133313331123313111311   >>    C3123121111113313121111331333133313331333223313331333112331311131   <<    C31231211111133131211113313331333133313332233133313331123313111313   >>      C31231211111133131211113313331333133313332233133313331123313111312   >>