  (Dual-)promotion and (dual-)evacuation are bijections on SYT(\lambda) for any
partition \lambda. Let c^r denote the rectangular partition (c,...,c) of height
r, and let sc_k (k > 2) denote the staircase partition (k,k-1,...,1). B.
Rhoades showed representation-theoretically that promotion on SYT(c^r) exhibits
the cyclic sieving phenomenon (CSP). In this paper, we demonstrate a promotion-
and evacuation-preserving embedding of SYT(sc_k) into SYT(k^{k+1}). This arose
from an attempt to demonstrate the CSP of promotion action on SYT(sc_k).
