H,W,M=(int(x) for x in input().split())
mod=998244353
ans=pow(M,H*W-H-W+1, mod)
chi=M
for i in range(1, H+W):
  ans *= chi
  ans *= pow(i, mod-2, mod)
  ans %= mod
  chi -= 1
chi=H+W-2
for i in range(1, H):
  ans *= chi
  ans *= pow(i, mod-2, mod)
  ans %= mod
  chi -= 1

print(ans%mod)