C312312111111331312111133133313231333131133132231333133313331311331323232211   >>    C31231211111133131211113313331323133313113313223133313331333131133132323221   <<    C312312111111331312111133133313231333131133132231333133313331311331323232213   >>      C312312111111331312111133133313231333131133132231333133313331311331323232212   >>