fun main() {
    val t = readLine()!!.toInt()
    val mod = 998244353L;

    repeat(t) {
        val N = readLine()!!.toLong()
        var ANS =1L;

        ANS=26L*(26L.modPow(N,mod)-1)%mod * 25L.modPow(mod-2,mod)%mod

        println(ANS)
    }
}


private fun Long.modPow(exponent: Long, modulus: Long): Long {
    var result = 1L
    var exp = exponent
    var base = this % modulus
    while (exp > 0) {
        if (exp and 1 == 1L) {
            result = (result * base) % modulus
        }
        base = (base * base) % modulus
        exp = exp shr 1
    }
    return result
}