N = int(input())
K = int(input())
L = list(range(N))

for i in range(K):
    X, Y = map(int, input().split())
    X, Y = X - 1, Y - 1
    L[X], L[Y] = L[Y], L[X]
print(L)
A = list(map(int, input().split()))
A = list(map(lambda x : x - 1, A))
D = [0] * N
for i in range(N):
    D[A[i]] = i

ans = []
for i in range(N):
    ind = L.index(D[i])
    for j in range(ind - 1, i - 1, -1):
        ans.append((j, j + 1))

print(len(ans))
for x, y in ans:
    print(x + 1, y + 1)