n=input()
k=input()
xy=[map(int,raw_input().split())for i in[k]*k]
a=[0]*n
t=map(int,raw_input().split())
for i in range(n):
	a[t[i]-1]=i+1
b=range(1,n+1)
for i in xy:
	x=i[0]-1
	y=i[1]-1
	b[x],b[y]=b[y],b[x]
#print b
t=[]
for i in range(n):
	for j in range(n-1,i,-1):
		if b[j]==a[i]:
			b[j],b[j-1]=b[j-1],b[j]
			t+=[[j-1,j]]
#print a,b,a==b
print len(t)
for i in t:
	print i[0]+1,i[1]+1