Problem: There are n segments [l_i, r_i] for 1 ≤ i ≤ n. You should divide all segments into two non-empty groups in such way that there is no pair of segments from different groups which have at least one common point, or say that it's impossible to do it. Each segment should belong to exactly one group.

To optimize testing process you will be given multitest.

Input

The first line contains one integer T (1 ≤ T ≤ 50000) — the number of queries. Each query contains description of the set of segments. Queries are independent.

First line of each query contains single integer n (2 ≤ n ≤ 10^5) — number of segments. It is guaranteed that ∑{n} over all queries does not exceed 10^5.

The next n lines contains two integers l_i, r_i per line (1 ≤ l_i ≤ r_i ≤ 2 ⋅ 10^5) — the i-th segment.

Output

For each query print n integers t_1, t_2, ..., t_n (t_i ∈ \{1, 2\}) — for each segment (in the same order as in the input) t_i equals 1 if the i-th segment will belongs to the first group and 2 otherwise.

If there are multiple answers, you can print any of them. If there is no answer, print -1.

Example

Input


3
2
5 5
2 3
3
3 5
2 3
2 3
3
3 3
4 4
5 5


Output


2 1 
-1
1 1 2 

Note

In the first query the first and the second segments should be in different groups, but exact numbers don't matter.

In the second query the third segment intersects with the first and the second segments, so they should be in the same group, but then the other group becomes empty, so answer is -1.

In the third query we can distribute segments in any way that makes groups non-empty, so any answer of 6 possible is correct.

Solution (in JAVA):

Solution:
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.StringTokenizer;

public class Main {

    public static void main(String args[]) throws Exception {
        init();
        int T = nextInt();
        for (int z = 0; z < T; z++) {
            int n = nextInt();
            Element [] e = new Element[n * 2];
            for (int i = 0; i < n * 2; i+= 2) {
                int l = nextInt(),
                        r = nextInt();
                e[i] = new Element(l, 0, i / 2);
                e[i + 1] = new Element(r, 1, i / 2);
            }
            Arrays.sort(e, new Element());
            int [] ans = new int[n];
            int k = 0, x = 0;
            for (int i = 0; i < n * 2; i++) {
                if (k == 0)
                    x = Math.min(x + 1, 2);
                ans[e[i].id] = x;
                if (e[i].type == 0)
                    k++;
                else
                    k--;
            }
            if (x != 2){
                out.println(-1);
            }else{
                for (int a : ans)
                    out.print(a + " ");
                out.println();
            }
        }
        out.close();
    }

    static BufferedReader scan;
    static PrintWriter out;
    static StringTokenizer st;

    static void init() {
        scan = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
    }

    static void init(String name1, String name2) throws Exception {
        try {
            scan = new BufferedReader(new FileReader(name1));
            out = new PrintWriter(name2);
        } catch (Exception e) {
            scan = new BufferedReader(new InputStreamReader(System.in));
            out = new PrintWriter(System.out);
        }
    }

    static String next() throws Exception {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(scan.readLine());
        return st.nextToken();
    }

    static int nextInt() throws Exception {
        return Integer.parseInt(next());
    }

    static long nextLong() throws Exception {
        return Long.parseLong(next());
    }
}

class Element implements Comparator<Element> {
    int x, type, id;

    public Element() {
    }

    public Element(int x, int type, int id) {
        this.x = x;
        this.type = type;
        this.id = id;
    }

    @Override
    public int compare(Element o1, Element o2) {
        if (o1.x != o2.x)
            return Integer.compare(o1.x, o2.x);
        return Integer.compare(o1.type, o2.type);
    }
}