import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
    public boolean hasNext() { skipUnprintable(); return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
    	return (int)nextLong();
    }
}

public class Main implements Runnable{

	public static void main(String[] args) {
		new Thread(null,new Main(), "" ,Runtime.getRuntime().maxMemory()).start();
	}
	
	final long MOD=(long)1e9+7;
	long ans=0;
	
	int dfs(int cur,ArrayList<Integer>[] g,long d) {
		int sz=0;
		for (int dst:g[cur]) {
			sz+=dfs(dst,g,d+1);
		}
		ans=(ans+d*sz%MOD)%MOD;
		return 1+sz;
	}
	
	public void run() {
		FastScanner sc=new FastScanner();
		int n=sc.nextInt();
		ArrayList<Integer>[] g=new ArrayList[n];
		for (int i=0;i<n;++i) {
			g[i]=new ArrayList<Integer>();
		}
		boolean[] root=new boolean[n];
		Arrays.fill(root, true);
		for (int i=0;i<n-1;++i) {
			int a=sc.nextInt();
			int b=sc.nextInt();
			--a;--b;
			g[a].add(b);
			root[b]=false;
		}
		int r=-1;
		for (int i=0;i<n;++i) if (root[i]) r=i;
		dfs(r,g,1);
		System.out.println(ans);
	}
	
	
	
	void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));}
}