#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1000000007;
template <typename T>
struct binary_indexed_tree{
  int N;
  vector<T> BIT;
  binary_indexed_tree(int N): N(N), BIT(N + 1, 0){
  }
  void add(int i, T x){
    i++;
    while (i <= N){
      BIT[i] += x;
      i += i & -i;
    }
  }
  T sum(int i){
    T ans = 0;
    while (i > 0){
      ans += BIT[i];
      i -= i & -i;
    }
    return ans;
  }
  T sum(int L, int R){
    return sum(R) - sum(L);
  }
};
int main(){
  int N, K;
  cin >> N >> K;
  vector<int> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  vector<char> s(K);
  for (int i = 0; i < K; i++){
    cin >> s[i];
  }
  vector<int> B = A;
  sort(B.begin(), B.end());
  B.erase(unique(B.begin(), B.end()), B.end());
  for (int i = 0; i < N; i++){
    A[i] = lower_bound(B.begin(), B.end(), A[i]) - B.begin();
  }
  int cnt = B.size();
  vector<vector<long long>> dp(K + 1, vector<long long>(N, 0));
  for (int i = 0; i < N; i++){
    dp[0][i] = 1;
  }
  for (int i = 0; i < K; i++){
    binary_indexed_tree<long long> BIT(cnt);
    for (int j = 0; j < N; j++){
      if (s[i] == '<'){
        dp[i + 1][j] = BIT.sum(0, A[j]) % MOD;
      }
      if (s[i] == '>'){
        dp[i + 1][j] = BIT.sum(A[j] + 1, cnt) % MOD;
      }
      BIT.add(A[j], dp[i][j]);
    }
  }
  long long ans = 0;
  for (int i = 0; i < N; i++){
    ans += dp[K][i];
  }
  ans %= MOD;
  cout << ans << endl;
}