#include <bits/stdc++.h>
using namespace std;
const int N = 5005;
struct two {
  int u, v, c;
};
int n, par[N][N], dd[N][N];
vector<int> a[N];
vector<two> q;
vector<pair<int, int> > e;
void dfs(int root, int u, int pre) {
  for (int v : a[u]) {
    if (v == pre) continue;
    par[root][v] = u;
    dfs(root, v, u);
  }
}
void update(int root, int v, int val) {
  while (v != root) {
    int u = par[root][v];
    dd[u][v] = val;
    dd[v][u] = val;
    v = u;
  }
}
int get_min(int root, int v) {
  int ans = 1e6;
  while (v != root) {
    int u = par[root][v];
    ans = min(ans, dd[u][v]);
    v = u;
  }
  return ans;
}
bool cmp(two a, two b) { return a.c < b.c; }
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  for (int i = 1; i < n; ++i) {
    int u, v;
    cin >> u >> v;
    dd[u][v] = 1e6;
    dd[v][u] = 1e6;
    a[u].push_back(v);
    a[v].push_back(u);
    e.push_back(make_pair(u, v));
  }
  for (int i = 1; i <= n; ++i) dfs(i, i, i);
  int m;
  cin >> m;
  for (int i = 1; i <= m; ++i) {
    int u, v, c;
    cin >> u >> v >> c;
    q.push_back({u, v, c});
  }
  sort(q.begin(), q.end(), cmp);
  for (int i = 0; i < m; ++i) {
    int u = q[i].u, v = q[i].v, c = q[i].c;
    update(u, v, c);
  }
  for (int i = 0; i < m; ++i) {
    int u = q[i].u, v = q[i].v, c = q[i].c;
    if (c != get_min(u, v)) return cout << -1, 0;
  }
  for (int i = 0; i < e.size(); ++i) {
    int u = e[i].first, v = e[i].second;
    cout << dd[u][v] << ' ';
  }
}

### Prompt

Please provide a CPP coded solution to the problem described below:

There are n railway stations in Berland. They are connected to each other by n-1 railway sections. The railway network is connected, i.e. can be represented as an undirected tree.

You have a map of that network, so for each railway section you know which stations it connects.

Each of the n-1 sections has some integer value of the scenery beauty. However, these values are not marked on the map and you don't know them. All these values are from 1 to 10^6 inclusive.

You asked m passengers some questions: the j-th one told you three values:

  * his departure station a_j; 
  * his arrival station b_j; 
  * minimum scenery beauty along the path from a_j to b_j (the train is moving along the shortest path from a_j to b_j). 



You are planning to update the map and set some value f_i on each railway section — the scenery beauty. The passengers' answers should be consistent with these values.

Print any valid set of values f_1, f_2, ..., f_{n-1}, which the passengers' answer is consistent with or report that it doesn't exist.

Input

The first line contains a single integer n (2 ≤ n ≤ 5000) — the number of railway stations in Berland.

The next n-1 lines contain descriptions of the railway sections: the i-th section description is two integers x_i and y_i (1 ≤ x_i, y_i ≤ n, x_i ≠ y_i), where x_i and y_i are the indices of the stations which are connected by the i-th railway section. All the railway sections are bidirected. Each station can be reached from any other station by the railway.

The next line contains a single integer m (1 ≤ m ≤ 5000) — the number of passengers which were asked questions. Then m lines follow, the j-th line contains three integers a_j, b_j and g_j (1 ≤ a_j, b_j ≤ n; a_j ≠ b_j; 1 ≤ g_j ≤ 10^6) — the departure station, the arrival station and the minimum scenery beauty along his path.

Output

If there is no answer then print a single integer -1.

Otherwise, print n-1 integers f_1, f_2, ..., f_{n-1} (1 ≤ f_i ≤ 10^6), where f_i is some valid scenery beauty along the i-th railway section.

If there are multiple answers, you can print any of them.

Examples

Input


4
1 2
3 2
3 4
2
1 2 5
1 3 3


Output


5 3 5


Input


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


Output


5 3 1 2 1 


Input


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


Output


-1

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
const int N = 5005;
struct two {
  int u, v, c;
};
int n, par[N][N], dd[N][N];
vector<int> a[N];
vector<two> q;
vector<pair<int, int> > e;
void dfs(int root, int u, int pre) {
  for (int v : a[u]) {
    if (v == pre) continue;
    par[root][v] = u;
    dfs(root, v, u);
  }
}
void update(int root, int v, int val) {
  while (v != root) {
    int u = par[root][v];
    dd[u][v] = val;
    dd[v][u] = val;
    v = u;
  }
}
int get_min(int root, int v) {
  int ans = 1e6;
  while (v != root) {
    int u = par[root][v];
    ans = min(ans, dd[u][v]);
    v = u;
  }
  return ans;
}
bool cmp(two a, two b) { return a.c < b.c; }
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  for (int i = 1; i < n; ++i) {
    int u, v;
    cin >> u >> v;
    dd[u][v] = 1e6;
    dd[v][u] = 1e6;
    a[u].push_back(v);
    a[v].push_back(u);
    e.push_back(make_pair(u, v));
  }
  for (int i = 1; i <= n; ++i) dfs(i, i, i);
  int m;
  cin >> m;
  for (int i = 1; i <= m; ++i) {
    int u, v, c;
    cin >> u >> v >> c;
    q.push_back({u, v, c});
  }
  sort(q.begin(), q.end(), cmp);
  for (int i = 0; i < m; ++i) {
    int u = q[i].u, v = q[i].v, c = q[i].c;
    update(u, v, c);
  }
  for (int i = 0; i < m; ++i) {
    int u = q[i].u, v = q[i].v, c = q[i].c;
    if (c != get_min(u, v)) return cout << -1, 0;
  }
  for (int i = 0; i < e.size(); ++i) {
    int u = e[i].first, v = e[i].second;
    cout << dd[u][v] << ' ';
  }
}

```