def swap(inlist,a,b):
    outlist = inlist
    outlist[a], outlist[b] = outlist[b], outlist[a]
    return outlist

n, k ,x = [ int(v) for v in input().split(" ") ]
up = x - 1
down = k - x
uplist, downlist = [], []

for i in range(up):
    uplist.append([ int(v) for v in input().split(" ") ])
input()
for i in range(down):
    downlist.append([ int(v) for v in input().split(" ") ])


numlistfromup = [i+1 for i in range(n)]
numlistfromdown = [ int(v) for v in input().split(" ") ]


downlist = downlist[::-1]

for i in range(up):
    numlistfromup = swap(numlistfromup,uplist[i][0]-1,uplist[i][1]-1)
for i in range(down):
    numlistfromdown = swap(numlistfromdown,downlist[i][0]-1,downlist[i][1]-1)


anslist = []

for i in range(n):
    if numlistfromup[i] != numlistfromdown[i]:
        anslist.append(str(i+1))
        if len(anslist) == 2:
            break
print(anslist[0] + " " + anslist[1])