var input = require("fs").readFileSync("/dev/stdin", "utf8");
input = input.split("\n");
let nkx = input.shift().split(" ");
let n = +nkx[0];
let k = +nkx[1];
let x = +nkx[2] - 1;
let swap = new Array();
let cups = new Array(n + 1);
for (let i = 0; i <= n; i++) {
    cups[i] = i;
}
for (let i = 0; i < k; i++) {
    let line = input.shift().split(" ");
    if (i == x) {
        swap.push(null);
        continue;
    }
    let a = +line[0];
    let b = +line[1];
    swap.push({ a: a, b: b });
}
let c = input.shift().split(" ").map((x) => { return +x; });
// 前から
for (let i = 0; i < x; i++) {
    let query = swap[i];
    let a = query.a;
    let b = query.b;
    let tmp = cups[a];
    cups[a] = cups[b];
    cups[b] = tmp;
}
// 後ろから
c.unshift(0);
for (let i = k - 1; i > x; i--) {
    let query = swap[i];
    let a = query.a;
    let b = query.b;
    let tmp = c[a];
    c[a] = c[b];
    c[b] = tmp;
}
let ans_a = 0;
let ans_b = 0;
for (let i = 0; i <= n; i++) {
    if (cups[i] != c[i]) {
        if (ans_a == 0) {
            ans_a = i;
        }
        else {
            ans_b = i;
            break;
        }
    }
}
console.log(ans_a, ans_b);