#include <bits/stdc++.h>
#include <atcoder/modint.hpp>
using namespace std;

using i32 = int;
using i64 = long long;
using i128 = __int128_t;
using f64 = double;
using p2 = pair<i64, i64>;
using el = tuple<i64, i64, i64>;
using mint = atcoder::modint998244353;

void _main();
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(18);
  _main();
}

void _main() {
  i64 n;
  cin >> n;
  vector<string> s(n);
  for (i64 i = 0; i < n; i++) cin >> s[i];
  map<pair<p2, p2>, mint> mp;
  for (i64 i = 0; i < n; i++) mp[{{i, n - i - 1}, {i, n - i - 1}}] = 1;
  i64 nxt[5] = {0, -1, 0, 1, 0};
  for (i64 k = n - 1; k >= 1; k--) {
    map<pair<p2, p2>, mint> nmp;
    for (auto [pp, c] : mp) {
      auto [a, b] = pp;
      auto [i1, j1] = a;
      auto [i2, j2] = b;
      for (i64 x = 0; x < 2; x++) for (i64 y = 2; y < 4; y++) {
        i64 ni1 = i1 + nxt[x], nj1 = j1 + nxt[x + 1];
        i64 ni2 = i2 + nxt[y], nj2 = j2 + nxt[y + 1];
        if (ni1 < 0 || nj1 < 0 || ni2 >= n || nj2 >= n) continue;
        if (s[ni1][nj1] != s[ni2][nj2]) continue;
        nmp[{{ni1, nj1}, {ni2, nj2}}] += c;
      }
    }
    swap(mp, nmp);
  }
  mint ans = 0;
  for (auto [pp, c] : mp) {
    ans += c;
  }
  cout << ans.val() << "\n";
}