n = int(input())
A = [i + 1 for i in range(n)]
m = int(input())
for _ in range(m):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    A[a], A[b] = A[b], A[a]
Id = list(map(int, input().split()))
B = [-1 for _ in range(n)]
for i in range(n):
    B[Id[i] - 1] = i + 1

ANS = []
for i in range(n):
    b = B[i]
    for j in range(i, n):
        a = A[j]
        if a == b:
            for k in range(j, i, -1):
                ANS.append((k, k + 1))
                A[k - 1], A[k] = A[k], A[k - 1]
print(len(ANS))
for a, b in ANS:
    print(a, b)