N = int(input())
K = int(input())
B = [i for i in range(1,N+1)]
for i in range(K):
    x, y = map(int, input().split())
    B[x-1],B[y-1] = B[y-1],B[x-1]

A = list(map(int, input().split()))
id = [-1]*N
for i in range(N):
    id[A[i]-1] = i+1
# print(*id)
ans = []
for i in range(N):
    for j in range(i,N):
        if id[i]==B[j]:
            for k in range(j-i):
                ans.append([j-k,j-k+1])
                B[j-k-1],B[j-k] = B[j-k], B[j-k-1]
assert id==B
print(len(ans))
for l, r in ans:
    print(l, r)