C3132121111133313233121111331333133313331333133313331333133313211232312121   >>    C313212111113331323312111133133313331333133313331333133313331321123231212   <<    C3132121111133313233121111331333133313331333133313331333133313211232312123   >>      C3132121111133313233121111331333133313331333133313331333133313211232312122   >>