N=int(input())
K=int(input())
A=[0]*N
for i in range(N):
    A[i]=i
for i in range(K):
    u,v=map(int,input().split())
    u-=1
    v-=1
    A[u],A[v]=A[v],A[u]
B=list(map(int,input().split()))
for i in range(N):
    B[i]-=1
C=[0]*N
for i in range(N):
    C[B[i]]=i
B=list(A)
res=0
for i in range(N):
    j=0
    while C[i]!=A[j]:
        j+=1
    while j!=i:
        A[j],A[j-1]=A[j-1],A[j]
        res+=1
        j-=1
print(res)
for i in range(N):
    j=0
    while C[i]!=B[j]:
        j+=1
    while j!=i:
        print(j,j+1,'')
        B[j],B[j-1]=B[j-1],B[j]
        j-=1