#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import numpy as np
MOD = 10 ** 9 + 7

N, M = map(int, readline().split())
W = np.array(readline().split(), np.int64)
UV = np.array(read().split(), np.int64) - 1
U = UV[::2]
V = UV[1::2]

A = np.zeros((N, N), np.int64)
np.fill_diagonal(A, W)
A[U, V] = np.minimum(W[U], W[V])

for k in range(N):
    A = np.maximum(A, np.minimum(A[:, k][:, None], A[k, :][None, :]))

# 全射の数え上げ
U = 1000
dp = np.zeros((U + 1, U + 1), np.int64)
dp[0, 0] = 1
for n in range(U):
    dp[n + 1] += np.arange(U + 1, dtype=np.int64) * dp[n]
    dp[n + 1, 1:] += np.arange(1, U + 1, dtype=np.int64) * dp[n, :-1]
    dp[n + 1] %= MOD

reachable = A == W[None, :]
answer = (dp[W][:, W] * reachable).sum() % MOD
print(answer)