#yuki_429

n,k,x=map(int,raw_input().split())
s=[int(i) for i in xrange(n+1)]
r=[raw_input().split() for i in xrange(k)]
c=map(int,raw_input().split())
c.insert(0,0)
for i in xrange(len(r)):
 if r[i][0]=='?':
  break
 a,b=int(r[i][0]),int(r[i][1])
 s[a],s[b]=s[b],s[a]
for i in xrange(len(r)-1,-1,-1):
 if r[i][0]=='?':
  break
 a,b=int(r[i][0]),int(r[i][1])
 c[a],c[b]=c[b],c[a]
res=[]
for i in xrange(n+1):
 if s[i]!=c[i]:
  res.append(i)
print res[0],res[1]