MOD = 10 ** 9 + 7

class Bit:
    def __init__(self, n):
        self.size = n
        self.n0 = 1 << (n.bit_length() - 1)
        self.tree = [0] * (n + 1)
    
    def range_sum(self, l, r):
        return self.sum(r - 1) - self.sum(l - 1)
        
    def sum(self, i):
        i += 1
        s = 0
        while i > 0:
            s += self.tree[i]
            s %= MOD
            i -= i & -i
        return s
        
    def get(self, i):
        return self.sum(i) - self.sum(i - 1)
 
    def add(self, i, x):
        i += 1
        while i <= self.size:
            self.tree[i] += x
            self.tree[i] %= MOD
            i += i & -i
         
    def lower_bound(self, x):
        pos = 0
        plus = self.n0
        while plus > 0:
            if pos + plus <= self.size and self.tree[pos + plus] < x:
                x -= self.tree[pos + plus]
                pos += plus
            plus //= 2
        return pos

n, k = map(int, input().split())
A = list(map(int, input().split()))
S = input()
se = set(A)
lst = sorted(se)
dic = {l:i for i, l in enumerate(lst)}
A = [dic[a] for a in A]

dp = [1] * n
for i in range(k):
    ndp = [0] * n
    bit = Bit(n)
    for j, a in enumerate(A):
        if S[i] == "<":
            ndp[j] = bit.sum(a - 1)
        else:
            ndp[j] = bit.range_sum(a + 1, n)
        bit.add(a, dp[j])
    dp = ndp
    
print(sum(dp) % MOD)