#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int n,k,x;
  cin>>n>>k>>x;
  x--;
  vector<Int> a(k),b(k);
  for(Int i=0;i<k;i++){
    char y;
    if(i!=x) cin>>a[i]>>b[i];
    else cin>>y>>y;
  }
  
  vector<Int> c(n),d(n);
  for(Int i=0;i<n;i++) cin>>c[i];
  iota(d.begin(),d.end(),0);

  for(Int i=0;i<k;i++){
    if(i==x) continue;
    a[i]--;b[i]--;
    swap(d[a[i]],d[b[i]]);
  }
  
  Int s=-1,t=-1;
  for(Int i=0;i<n;i++){
    c[i]--;
    if(d[i]!=c[i]) t=s,s=d[i];
  }
  
  for(Int i=k-1;i>x;i--)
    swap(d[a[i]],d[b[i]]);

  Int p=-1,q=-1;
  for(Int i=0;i<n;i++){
    if(s==d[i]) p=i;
    if(t==d[i]) q=i;
  }
  
  if(p>q) swap(p,q);
  cout<<p+1<<" "<<q+1<<endl;
  return 0;
}