n = int(input())
k = int(input())
P = [i for i in range(n)]
for _ in range(k):
    x, y = map(int, input().split())
    x -= 1
    y -= 1
    P[x], P[y] = P[y], P[x]
A = list(map(int, input().split()))
A = [a - 1 for a in A]
ans = []
for i, a in enumerate(A):
    for j in range(i, n):
        if P[j] == a:
            break
    for k in range(j, i, -1):
        ans.append((k, k + 1))
        P[k], P[k - 1] = P[k - 1], P[k]

print(len(ans))
for row in ans:
    print(*row)