n=int(input())
k=int(input())
x=[i+1 for i in range(n)]
for i in range(k):
    a,b=map(int,input().split());a-=1;b-=1
    x[a],x[b]=x[b],x[a]
ans=[]
a=list(map(int,input().split()))
b=[0]*n
for i in range(n):
	b[a[i]-1]=i+1
a=b
for i in range(n):
    if a[i]==x[i]:
        continue
    for j in range(i+1,n):
        if a[i]==x[j]:
            for l in range(j,i,-1):
            	x[l],x[l-1]=x[l-1],x[l]
            	ans.append((l,l+1))
            break
print(len(ans))
for i,j in ans:
    print(i,j)