C31231211111133131211113313331333133112111133133313331122322331333132313232211   >>    C3123121111113313121111331333133313311211113313331333112232233133313231323221   <<    C31231211111133131211113313331333133112111133133313331122322331333132313232213   >>      C31231211111133131211113313331333133112111133133313331122322331333132313232212   >>