C312312111111331312111133133313331333133313231333133112111133133313221133131   >>    C31231211111133131211113313331333133313331323133313311211113313331322113313   <<    C312312111111331312111133133313331333133313231333133112111133133313221133133   >>      C312312111111331312111133133313331333133313231333133112111133133313221133132   >>