#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>

using namespace std;

using ll = long long;
const ll modc = 998244353;

long long mod_exp(long long b, long long e, long long m){
    if (e > 0 && b == 0) return 0;
    long long ans = 1;
    b %= m;

    while (e > 0){
        if ((e & 1LL)) ans = (ans * b) % m;
        e = e >> 1LL;
        b = (b*b) % m;
    }

    return ans;
}

int main(){

    ll H, W, M, a, b, ans=0;
    cin >> H >> W >> M;

    for (int m=1; m<=M; m++){
        a = (mod_exp(M-m+1, H, modc) + modc - mod_exp(M-m, H, modc)) % modc;
        b = (mod_exp(M-m+1, W, modc) + modc - mod_exp(M-m, W, modc)) % modc;
        ans += (a*b) % modc;
        ans %= modc;
    }

    cout << ans << endl;

    return 0;
}