C312312111111331312111133133313231333133313121211113313223322121   >>    C31231211111133131211113313331323133313331312121111331322332212   <<    C312312111111331312111133133313231333133313121211113313223322123   >>      C312312111111331312111133133313231333133313121211113313223322122   >>