import java.io.*;
import java.util.*;

public class Solution {

    // public static void main(String[] args) {
    //     /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    // }
     static long[] fact = new long[14];

    public static void main(String[] args) {
        factorialFill();

        Scanner scanner = new Scanner(System.in);
        int t = scanner.nextInt();

        for (int a0 = 0; a0 < t; a0++) {
            long n = scanner.nextLong();
            int[] arrc = new int[13];
            factorialNum(n - 1, arrc);
            printPermutation(arrc);
            System.out.println();
        }
        scanner.close();
    }

    static void factorialFill() {
        fact[0] = 1;
        for (int i = 1; i < 14; i++) {
            fact[i] = i * fact[i - 1];
        }
    }

    static void factorialNum(long n, int[] arrc) {
        long tmp = n;
        int index = 0;
        for (int i = 13; i >= 0; i--) {
            if (fact[i] <= tmp) {
                index = i;
                break;
            }
        }

        long q, r;
        while (index >= 0) {
            q = tmp / fact[index];
            r = tmp % fact[index];
            arrc[index] = (int) q;
            tmp = r;
            index--;
        }
    }

    static void updateList(char[] str, int index) {
        for (int i = index + 1; i <= 12; i++) {
            str[i - 1] = str[i];
        }
    }

    static void printPermutation(int[] arrc) {
        char[] str = "abcdefghijklm".toCharArray();
        for (int i = 12; i >= 0; i--) {
            System.out.print(str[arrc[i]]);
            updateList(str, arrc[i]);
        }
    }
}