#include <bits/stdc++.h>
using namespace std;
const int N = 5050;
int n, m;
int id[N][N];
struct edge {
  int v, nxt;
} e[N << 1];
int head[N], ecnt;
void ad(int u, int v) {
  e[++ecnt].v = v;
  e[ecnt].nxt = head[u];
  head[u] = ecnt;
}
struct querys {
  int a, b, mn;
} q[N];
bool cmp(const querys &x, const querys &y) { return x.mn > y.mn; }
int pre[N];
vector<int> vec[N];
int num[N], tot;
int S, T;
void dfs(int u, int fa) {
  if (u == T) return;
  for (int i = head[u]; i; i = e[i].nxt) {
    int v = e[i].v;
    if (v == fa) continue;
    pre[v] = u;
    dfs(v, u);
  }
}
int ans[N];
int main() {
  cin >> n;
  for (int i = 1; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    ad(x, y), ad(y, x);
    id[x][y] = id[y][x] = i;
  }
  cin >> m;
  for (int i = 1; i <= m; ++i) {
    scanf("%d%d%d", &q[i].a, &q[i].b, &q[i].mn);
    if (q[i].a > q[i].b) swap(q[i].a, q[i].b);
    num[++tot] = q[i].mn;
  }
  sort(num + 1, num + tot + 1, greater<int>());
  int mx = num[tot];
  sort(q + 1, q + m + 1, cmp);
  for (int i = 1; i <= m; ++i) {
    memset(pre, -1, sizeof(pre));
    S = q[i].a, T = q[i].b;
    dfs(S, 0);
    bool flag = false;
    int now = 9999999;
    for (int j = T; pre[j] != -1; j = pre[j]) {
      int u = j, v = pre[j];
      if (ans[id[u][v]]) {
        now = min(ans[id[u][v]], now);
        continue;
      }
      ans[id[u][v]] = q[i].mn;
      now = q[i].mn;
      flag = 1;
    }
    if (!flag && q[i].mn != now) return puts("-1"), 0;
  }
  for (int i = 1; i < n; ++i)
    if (!ans[i]) ans[i] = 1e6;
  for (int i = 1; i < n; ++i) cout << ans[i] << " ";
  return 0;
}

### Prompt

Develop a solution in CPP 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 = 5050;
int n, m;
int id[N][N];
struct edge {
  int v, nxt;
} e[N << 1];
int head[N], ecnt;
void ad(int u, int v) {
  e[++ecnt].v = v;
  e[ecnt].nxt = head[u];
  head[u] = ecnt;
}
struct querys {
  int a, b, mn;
} q[N];
bool cmp(const querys &x, const querys &y) { return x.mn > y.mn; }
int pre[N];
vector<int> vec[N];
int num[N], tot;
int S, T;
void dfs(int u, int fa) {
  if (u == T) return;
  for (int i = head[u]; i; i = e[i].nxt) {
    int v = e[i].v;
    if (v == fa) continue;
    pre[v] = u;
    dfs(v, u);
  }
}
int ans[N];
int main() {
  cin >> n;
  for (int i = 1; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    ad(x, y), ad(y, x);
    id[x][y] = id[y][x] = i;
  }
  cin >> m;
  for (int i = 1; i <= m; ++i) {
    scanf("%d%d%d", &q[i].a, &q[i].b, &q[i].mn);
    if (q[i].a > q[i].b) swap(q[i].a, q[i].b);
    num[++tot] = q[i].mn;
  }
  sort(num + 1, num + tot + 1, greater<int>());
  int mx = num[tot];
  sort(q + 1, q + m + 1, cmp);
  for (int i = 1; i <= m; ++i) {
    memset(pre, -1, sizeof(pre));
    S = q[i].a, T = q[i].b;
    dfs(S, 0);
    bool flag = false;
    int now = 9999999;
    for (int j = T; pre[j] != -1; j = pre[j]) {
      int u = j, v = pre[j];
      if (ans[id[u][v]]) {
        now = min(ans[id[u][v]], now);
        continue;
      }
      ans[id[u][v]] = q[i].mn;
      now = q[i].mn;
      flag = 1;
    }
    if (!flag && q[i].mn != now) return puts("-1"), 0;
  }
  for (int i = 1; i < n; ++i)
    if (!ans[i]) ans[i] = 1e6;
  for (int i = 1; i < n; ++i) cout << ans[i] << " ";
  return 0;
}

```