The following problem is well-known: given integers n and m, calculate

<image>, 

where 2n = 2·2·...·2 (n factors), and <image> denotes the remainder of division of x by y.

You are asked to solve the "reverse" problem. Given integers n and m, calculate

<image>. 

Input

The first line contains a single integer n (1 ≤ n ≤ 108).

The second line contains a single integer m (1 ≤ m ≤ 108).

Output

Output a single integer — the value of <image>.

Examples

Input

4
42


Output

10


Input

1
58


Output

0


Input

98765432
23456789


Output

23456789

Note

In the first example, the remainder of division of 42 by 24 = 16 is equal to 10.

In the second example, 58 is divisible by 21 = 2 without remainder, and the answer is 0.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.StringTokenizer;

public class Main {

    FastScanner in;
    PrintWriter out;
    
    void solve() {
        
    	int n = in.nextInt();
    	long m = in.nextInt();
    	BigInteger n2 = BigInteger.valueOf(2).pow(n);
    	
        out.println(BigInteger.valueOf(m).remainder(n2));
    }

    void runIO() {
        in = new FastScanner(System.in);
        out = new PrintWriter(System.out);

        solve();

        out.close();
    }

    void run() {
        try {
            in = new FastScanner(new File("test.in"));
            out = new PrintWriter(new File("test.out"));

            solve();

            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    class FastScanner {

        BufferedReader br;
        StringTokenizer st;

        public FastScanner(File f) {
            try {
                br = new BufferedReader(new FileReader(f));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }

        public FastScanner(InputStream f) {
            br = new BufferedReader(new InputStreamReader(f));
        }

        String next() {
            while (st == null || !st.hasMoreTokens()) {
                String s = null;
                try {
                    s = br.readLine();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (s == null) {
                    return null;
                }
                st = new StringTokenizer(s);
            }
            return st.nextToken();
        }

        String nextLine() {
            String s = null;
            while (st == null || !st.hasMoreTokens()) {
                try {
                    s = br.readLine();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (s == null) {
                    return null;
                }
                return s;
            }
            return s;
        }

        boolean hasMoreTokens() {
            while (st == null || !st.hasMoreTokens()) {
                String s = null;
                try {
                    s = br.readLine();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (s == null) {
                    return false;
                }
                st = new StringTokenizer(s);
            }
            return true;
        }

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

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

        double nextDouble() {
            return Double.parseDouble(next());
        }
    }

    public static void main(String[] args) throws IOException {
        new Main().runIO();
    }
}

class Pair {

    int first;
    int second;

    Pair(int first, int second) {
        this.first = first;
        this.second = second;
    }
}

class Node {

    int value;
    ArrayList<String> edges;

    Node(int v) {
        this.value = v;
        edges = new ArrayList<String>();
    }
}

class Contestant {

    int id;
    long time;
    int probsSolved;
    int[] probs;

    Contestant(int id) {
        this.id = id;
        time = 0;
        probsSolved = 0;
        probs = new int[11];
    }
}