#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001


int main(){
   
   int t;
   cin>>t;
   rep(i,t){
     long long n;
     cin>>n;
     mint ans = mint(26).pow(n+1) - 1;
     ans /= 25;
     ans--;
     cout<<ans.val()<<endl;
   }
  
	return 0;
}