  In a 2121 paper with G\'abor Cz\'edli, we introduced and verified the
Three-pendant Three-crown Property, 3P3C, for congruence lattices of slim,
planar, semimodular lattices. The proof is very long; in part, because it
relies on Cz\'edli's 2021 paper on lamps.
  This paper verifies 3P3C using the Swing Lemma, an elementary and short
approach.
