import sys
input = lambda : sys.stdin.readline().rstrip()

write = lambda x: sys.stdout.write(x+"\n"); writef = lambda x: print("{:.12f}".format(x))
debug = lambda x: sys.stderr.write(x+"\n")
YES="Yes"; NO="No"; pans = lambda v: print(YES if v else NO)
LI = lambda : list(map(int, input().split()))
sys.setrecursionlimit(3*10**5+10)

h,w,m = LI()
M = 998244353
ans = 0
for j in range(1,m+1):
    val = pow(m-j+1, h, M) - pow(m-j, h, M)
    val2 = pow(m-j+1, w, M) - pow(m-j, w, M)
    ans += val*val2%M
    ans %= M
print(ans%M)