Construct list using q XOR queries

//Construct list using q XOR queries

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

class IntMatrix {
    public static int[][] input(BufferedReader br, int n, int m) throws IOException {
        int[][] mat = new int[n][];

        for(int i = 0; i < n; i++) {
            String[] s = br.readLine().trim().split(" ");
            mat[i] = new int[s.length];

            for(int j = 0; j < s.length; j++)
              mat[i][j] = Integer.parseInt(s[j]);
        }

        return mat;
    }

    public static void print(int[][] m) {
        for(var a : m) {
            for(int e : a)
              System.out.print(e + " ");
            System.out.println();
        }
    }

    public static void print(ArrayList<ArrayList<Integer>> m) {
        for(var a : m) {
            for(int e : a)
              System.out.print(e + " ");
            System.out.println();
        }
    }
}

class IntArray {
    public static int[] input(BufferedReader br, int n) throws IOException {
        String[] s = br.readLine().trim().split(" ");
        int[] a = new int[n];

        for(int i = 0; i < n; i++)
          a[i] = Integer.parseInt(s[i]);

        return a;
    }

    public static void print(int[] a) {
        for(int e : a)
          System.out.print(e + " ");
        System.out.println();
    }

    public static void print(ArrayList<Integer> a) {
        for(int e : a)
          System.out.print(e + " ");
        System.out.println();
    }
}

class GFG {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(br.readLine());

        while(t-- > 0) {
            int q = Integer.parseInt(br.readLine());
            int[][] queries = IntMatrix.input(br, q, 2);
            Solution obj = new Solution();
            ArrayList<Integer> res = obj.constructList(q, queries);
            IntArray.print(res);
        }
    }
}

class Solution {
    public static ArrayList<Integer> constructList(int q, int[][] queries) {
        int x = 0;
        ArrayList<Integer> ans = new ArrayList<>();
        
        for(int i = q - 1; i >= 0; i--) {
            if(queries[i][0] == 1) {
                x ^= queries[i][1];
            }
            else {
                ans.add(queries[i][1] ^ x);
            }
        }
        
        ans.add(x);
        Collections.sort(ans);
        
        return ans;
    }
}