You are given two integers a and b.

In one move, you can choose some integer k from 1 to 10 and add it to a or subtract it from a. In other words, you choose an integer k ∈ [1; 10] and perform a := a + k or a := a - k. You may use different values of k in different moves.

Your task is to find the minimum number of moves required to obtain b from a.

You have to answer t independent test cases.

Input

The first line of the input contains one integer t (1 ≤ t ≤ 2 ⋅ 10^4) — the number of test cases. Then t test cases follow.

The only line of the test case contains two integers a and b (1 ≤ a, b ≤ 10^9).

Output

For each test case, print the answer: the minimum number of moves required to obtain b from a.

Example

Input


6
5 5
13 42
18 4
1337 420
123456789 1000000000
100500 9000


Output


0
3
2
92
87654322
9150

Note

In the first test case of the example, you don't need to do anything.

In the second test case of the example, the following sequence of moves can be applied: 13 → 23 → 32 → 42 (add 10, add 9, add 10).

In the third test case of the example, the following sequence of moves can be applied: 18 → 10 → 4 (subtract 8, subtract 6).
import java.util.*;
import java.io.*;
import static java.lang.Math.*;

public class Main implements Runnable
{
    boolean multiple = true;
    long MOD;

    @SuppressWarnings("Duplicates")
    void solve() throws Exception
    {
        long a = sc.nextLong();
        long b = sc.nextLong();
        if (a == b)
            System.out.println(0);
        else if (a > b)
        {
            if (a % 2 == b % 2)
                System.out.println(1);
            else
                System.out.println(2);
        }
        else
        {
            if (a % 2 == b % 2)
                System.out.println(2);
            else
                System.out.println(1);
        }
    }

    class Node implements Comparable<Node>
    {
        long cost;
        int idx;

        Node(long C, int i)
        {
            cost = C;
            idx = i;
        }

        @Override
        public int compareTo(Node o)
        {
            return (int)(o.cost - cost);
        }
    }

    long inv(long a, long b)
    {
        return 1 < a ? b - inv(b % a, a) * b / a : 1;
    }

    long gcd(long a, long b)
    {
        return a == 0 ? b : gcd(b % a, a);
    }

    long lcm(long a, long b) { return (a * b) / gcd(a , b); }

    class SegNode
    {
        int max;
        int L, R;
        SegNode left = null, right = null;

        int query(int queryL, int queryR)
        {
            if (queryL == L && queryR == R)
                return max;

            int leftAns = Integer.MIN_VALUE, rightAns = Integer.MIN_VALUE;
            if (left != null && queryL <= left.R)
                leftAns = left.query(queryL, min(queryR, left.R));
            if (right != null && queryR >= right.L)
                rightAns = right.query(max(queryL, right.L), queryR);

            return max(leftAns, rightAns);
        }

        SegNode(int[] arr, int l, int r)
        {
            L = l;
            R = r;
            max = arr[l];

            if (l == r) return;

            int mid = (l + r) / 2;
            left = new SegNode(arr, l, mid);
            right = new SegNode(arr, mid + 1, r);
            max = max(left.max, right.max);
        }
    }

    void print(long[] arr)
    {
        for (int i = 0; i < arr.length; i++)
            System.out.print(arr[i] + " ");
        System.out.println();
    }

    @Override
    public void run()
    {
        try
        {
            in = new BufferedReader(new InputStreamReader(System.in));
            out = new PrintWriter(System.out);
            sc = new FastScanner(in);
            if (multiple)
            {
                int q = sc.nextInt();
                for (int i = 0; i < q; i++)
                    solve();
            }
            else
                solve();
        }
        catch (Throwable uncaught)
        {
            Main.uncaught = uncaught;
        }
        finally
        {
            out.close();
        }
    }

    public static void main(String[] args) throws Throwable
    {
        Thread thread = new Thread(null, new Main(), "", (1 << 26));
        thread.start();
        thread.join();
        if (Main.uncaught != null) {
            throw Main.uncaught;
        }
    }

    static Throwable uncaught; BufferedReader in; FastScanner sc; PrintWriter out;
}

class FastScanner
{
    BufferedReader in;
    StringTokenizer st;

    public FastScanner(BufferedReader in)
    {
        this.in = in;
    }

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

    public int nextInt() throws Exception {
        return Integer.parseInt(nextToken());
    }

    public long nextLong() throws Exception {
        return Long.parseLong(nextToken());
    }

    public double nextDouble() throws Exception {
        return Double.parseDouble(nextToken());
    }
}