#!/usr/bin/env python
#coding:utf8

def read():
    nNum, nSwap, hiddenSwap = map(int, raw_input().split())

    swapList = []
    for i in range(nSwap):
        if i + 1 != hiddenSwap:
            swapList.append(map(int, raw_input().split()))
        else:
            raw_input()
            swapList.append([-1, -1])

    lastState = map(int, raw_input().split())

    return nNum, swapList, hiddenSwap, lastState


def work((nNum, swapList, hiddenSwap, lastState)):
    state1 = [i + 1 for i in range(nNum)]
    for (idx, (s, t)) in enumerate(swapList):
        if idx + 1 == hiddenSwap:
            break
        state1[s - 1], state1[t - 1] = state1[t - 1], state1[s - 1]
    
    state2 = lastState
    for idx in range(len(swapList))[::-1]:
        if idx + 1 == hiddenSwap:
            break
        s, t = swapList[idx]
        state2[s - 1], state2[t - 1] = state2[t - 1], state2[s - 1]

    ans = []
    for i in range(nNum):
        if state1[i] != state2[i]:
            ans.append(i + 1)

    print ans[0], ans[1]


if __name__ == "__main__":
    work(read())