#include <bits/stdc++.h>
const double EPS = 1e-24;
const long long int MOD = 1000000007ll;
const double PI = 3.14159265359;
int INF = 2147483645;
long long int INFINF = 9223372036854775807;
template <class T>
T Max2(T a, T b) {
  return a < b ? b : a;
}
template <class T>
T Min2(T a, T b) {
  return a < b ? a : b;
}
template <class T>
T Max3(T a, T b, T c) {
  return Max2(Max2(a, b), c);
}
template <class T>
T Min3(T a, T b, T c) {
  return Min2(Min2(a, b), c);
}
template <class T>
T Max4(T a, T b, T c, T d) {
  return Max2(Max2(a, b), Max2(c, d));
}
template <class T>
T Min4(T a, T b, T c, T d) {
  return Min2(Min2(a, b), Max2(c, d));
}
using namespace std;
long long int N;
vector<long long int> G[100010];
long long int dp[100010][2];
bool vis[100010];
long long int color[100010];
void dfs(long long int u) {
  vis[u] = true;
  if (color[u]) {
    dp[u][0] = 0;
    dp[u][1] = 1;
  } else {
    dp[u][0] = 1;
    dp[u][1] = 0;
  }
  for (long long int v : G[u]) {
    if (!vis[v]) {
      dfs(v);
      long long int temp[2];
      temp[0] = dp[u][0];
      temp[1] = dp[u][0];
      temp[1] = (dp[u][1] * dp[v][1]) % MOD;
      temp[1] = (temp[1] + dp[u][0] * dp[v][1]) % MOD;
      temp[1] = (temp[1] + dp[u][1] * dp[v][0]) % MOD;
      temp[0] = (dp[u][0] * dp[v][1]) % MOD;
      temp[0] = (temp[0] + dp[u][0] * dp[v][0]) % MOD;
      dp[u][0] = temp[0];
      dp[u][1] = temp[1];
    }
  }
}
int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(NULL);
  cin >> N;
  for (int i = 1; i <= N - 1; i++) {
    long long int x;
    cin >> x;
    G[x].push_back(i);
    G[i].push_back(x);
  }
  for (int i = 0; i < N; i++) cin >> color[i];
  dfs(0);
  cout << dp[0][1] << "\n";
  return 0;
}
