def f(n):
    a = r = 26
    inv = pow(a-1, MOD-2, MOD)
    num = a * (pow(r, n, MOD) - 1)
    return num * inv % MOD


MOD = 998244353
T = int(input())
for _ in range(T):
    L = int(input())
    ans = f(L)
    print(ans)