#include<bits/stdc++.h>
using namespace std;
using ll=long long;
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
template<class T> bool chmax(T &a, T b){if (a < b){a = b;return true;} else return false;}
template<class T> bool chmin(T &a, T b){if (a > b){a = b;return true;} else return false;}

const ll MOD=998244353;
const ll inv5=319438193;

ll power(ll x,ll r){
    ll re=1,k=x;
    for(int i=0;i<60;i++){
        if(r>>i&1){
            re=(re*k)%MOD;
        }
        k=k*k%MOD;
    }
    return re;
}

void solve(){
	ll L;
	cin>>L;
	ll ans=(power(26,L+1)-1)*inv5%MOD;
	ans--;
	if(ans<0)ans+=MOD;
	cout<<ans<<"\n";
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
	int T;
	cin>>T;
	while(T--){
		solve();
	}
}