Problem: Dasha decided to have a rest after solving the problem. She had been ready to start her favourite activity — origami, but remembered the puzzle that she could not solve. 

<image>

The tree is a non-oriented connected graph without cycles. In particular, there always are n - 1 edges in a tree with n vertices.

The puzzle is to position the vertices at the points of the Cartesian plane with integral coordinates, so that the segments between the vertices connected by edges are parallel to the coordinate axes. Also, the intersection of segments is allowed only at their ends. Distinct vertices should be placed at different points. 

Help Dasha to find any suitable way to position the tree vertices on the plane.

It is guaranteed that if it is possible to position the tree vertices on the plane without violating the condition which is given above, then you can do it by using points with integral coordinates which don't exceed 1018 in absolute value.

Input

The first line contains single integer n (1 ≤ n ≤ 30) — the number of vertices in the tree. 

Each of next n - 1 lines contains two integers ui, vi (1 ≤ ui, vi ≤ n) that mean that the i-th edge of the tree connects vertices ui and vi.

It is guaranteed that the described graph is a tree.

Output

If the puzzle doesn't have a solution then in the only line print "NO".

Otherwise, the first line should contain "YES". The next n lines should contain the pair of integers xi, yi (|xi|, |yi| ≤ 1018) — the coordinates of the point which corresponds to the i-th vertex of the tree.

If there are several solutions, print any of them. 

Examples

Input

7
1 2
1 3
2 4
2 5
3 6
3 7

Output

YES
0 0
1 0
0 1
2 0
1 -1
-1 1
0 2

Input

6
1 2
2 3
2 4
2 5
2 6


Output

NO


Input

4
1 2
2 3
3 4

Output

YES
3 3
4 3
5 3
6 3

Note

In the first sample one of the possible positions of tree is: <image>

Solution (in JAVA):

Solution:

import java.io.*;
import java.util.*;
/**
 *
 * @author Sourav Kumar Paul (spaul100)
 * NIT Silchar    
 */

public class SolveE {

    public static Reader in;
    public static PrintWriter out;
    public static long mod = 1000000007;
    public static long inf = 100000000000000000l;
    public static long fac[],inv[];
    public static int union[];
    public static ArrayList<Integer> adj[];
    public static void solve(){
        int n = in.nextInt();
        adj = new ArrayList[n];
        for(int i=0; i<n; i++)
            adj[i] = new ArrayList<>();
          int ou[] = new int[n];
        for(int i=0; i<n-1; i++)
        {
            int x = in.nextInt()-1;
            int y = in.nextInt()-1;
            adj[x].add(y);
            adj[y].add(x);
            ou[x]++;
            ou[y]++;
        }
        int max = 0, most = 0;
        for(int i=0; i<n; i++)
        {
            if(ou[i] > max)
            {
                max = ou[i];
                most = i;
            }
        }
        if(max > 4)
        {
            out.println("NO");
            out.flush();
            out.close();
            return;
        }
        xx = new long[n];
        yy = new long[n];
        
        dfs(most, -1, 0,0,(1l<<n), -1);
        out.println("YES");
        for(int i=0; i<n; i++)
        {
            out.println(xx[i]+" "+yy[i]);
        }
    }
    public static long xx[], yy[];
    public static long dix[] = {-1,0,1,0}, diy[] = {0,1,0,-1};

    private static void dfs(int start, int par, long x, long y, long sz, int dir) {
      
        xx[start] = x;
        yy[start] = y;
        int pp = -1;
        for(int v: adj[start])
        {
            if(v!= par)
            {
                pp++;
                if(pp == dir)
                    pp++;
                dfs(v, start, x+dix[pp]*sz, y + diy[pp]*sz, sz/2, (pp + 2)%4);
            }
        }
    }
/**
 *  ############################### Template ################################
 */
    

    public static class Pair implements Comparable{
        int x,y;
       
        Pair(int x, int y)
        {
            this.x = x;
            this.y = y;
        }
        @Override
        public int compareTo(Object o)
        {
            Pair pp = (Pair)o;
            if(pp.x == x)
                return 0;
            else if (x>pp.x)
                return 1;
            else 
                return -1;
        }
    }

   
    public static void init()
    {
        for(int i=0; i<union.length; i++)
            union[i] = i;
    }
    public static int find(int n)
    {
        return (union[n]==n)?n:(union[n]=find(union[n]));
    }
    public static void unionSet(int i ,int j)
    {
        union[find(i)]=find(j);
    }
    public static boolean connected(int i,int j)
    {   
        return union[i]==union[j];
    }

    public static long gcd(long a, long b) {
        long x = Math.min(a,b);
        long y = Math.max(a,b);
        while(x!=0)
        {
            long temp = x;
            x = y%x;
            y = temp;
        }
        return y;       
    }

    public static long modPow(long base, long exp, long mod) {
        base = base % mod;
        long result =1;
        while(exp > 0)
        {
            if(exp % 2== 1)
            {
                result = (result * base) % mod;
                exp --;
            }
            else
            {
                base = (base * base) % mod;
                exp = exp >> 1;
            }
            
        }
        return result;
    }
    
    public static void cal()
    {
        fac = new long[1000005];
        inv = new long[1000005];
        fac[0]=1;
        inv[0]=1;
        for(int i=1; i<=1000000; i++)
        {
            fac[i]=(fac[i-1]*i)%mod;
            inv[i]=(inv[i-1]*modPow(i,mod-2,mod))%mod;
        }
    }
    public static long ncr(int n, int r)
    {
        return (((fac[n]*inv[r])%mod)*inv[n-r])%mod;
    }


    SolveE() throws IOException {
	in = new Reader(new InputStreamReader(System.in));
        out = new PrintWriter(new OutputStreamWriter(System.out));
	solve();
        out.flush();
	out.close();
    }
 
    public static void main(String args[]) {
	new Thread(null, new Runnable() {
            public void run() {
                try {
                    new SolveE();
		} catch (Exception e) {
                    e.printStackTrace();
		}
            }
	}, "1", 1 << 26).start();
    }
    
    public static class Reader {
        public BufferedReader reader;
        public StringTokenizer st;

        public Reader(InputStreamReader stream) {
            reader = new BufferedReader(stream);
            st = null;
        }

        public String next() {
            while (st == null || !st.hasMoreTokens()) {
                try {
                    st = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return st.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        public String nextLine() throws IOException{
            return reader.readLine();
        }
        public long nextLong(){
            return Long.parseLong(next());
        }
        public double nextDouble(){
            return Double.parseDouble(next());
        }

    }
}