C312312111111331312111133133313231333131211331333132233132313232211   >>    C31231211111133131211113313331323133313121133133313223313231323221   <<    C312312111111331312111133133313231333131211331333132233132313232213   >>      C312312111111331312111133133313231333131211331333132233132313232212   >>