mod = 998244353
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    H, W, M = map(int, input().split())

    ans = 0
    for m in range(1, M + 1):
        tmp = pow(M - m + 1, H, mod) - pow(M - m, H, mod)
        if m == 1:
            tmp2 = pow(M, W, mod) - pow(M - 1, W, mod)
        else:
            tmp2 = pow(M - m + 1, W, mod) - pow(M - m, W, mod)
        ans = (ans + (tmp * tmp2)%mod)%mod

        tmp = pow(M - m + 1, W, mod) - pow(M - m, W, mod)
        if m == 1:
            tmp2 = pow(M, H, mod) - pow(M - 1, H, mod)
        else:
            tmp2 = pow(M - m + 1, H, mod) - pow(M - m, H, mod)
        ans = (ans + (tmp * tmp2)%mod) % mod

        # same
        tmp = pow(M - m + 1, H, mod) - pow(M - m, H, mod)
        if m == 1:
            tmp2 = pow(M, W, mod) - pow(M - 1, W, mod)
        else:
            tmp2 = pow(M - m + 1, W, mod) - pow(M - m, W, mod)
        ans = (ans - (tmp * tmp2)%mod) % mod
    print(ans)


if __name__ == '__main__':
    main()