#include <bits/stdc++.h>
 
using namespace std;
 
#define DEBUG(x) cerr<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl;
#define DEBUG_MAT(v) cerr<<#v<<endl;for(int i=0;i<v.size();i++){for(int j=0;j<v[i].size();j++) {cerr<<v[i][j]<<" ";}cerr<<endl;}
typedef long long ll;
// #define int ll
 
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); }
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define rrep(i,n) for(int i=(int)(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(int)(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a = b; return 1; } return 0; }
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const long double pi = 3.1415926535897932384626433832795028841971L;
#define Sp(p) cout<<setprecision(25)<< fixed<<p<<endl;
//int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
//int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
vi dx = {1, 0, -1, 0}, dy = {0, 1, 0, -1};
vi dx2 = { 1,1,0,-1,-1,-1,0,1 }, dy2 = { 0,1,1,1,0,-1,-1,-1 };
#define fio() cin.tie(0); ios::sync_with_stdio(false);
const ll MOD = 1000000007;
//const ll MOD = 998244353;
// #define mp make_pair
//#define endl '\n'


int n, p, q;
vi a;

bool check1() {
    set<int> st;
    rep (i, n) {
        if (i != q) st.insert(i);
    }

    bool big = false;
    rep (i, n) {
        if (not big) {
            auto itr = st.end();
            if (itr == st.begin()) return false;
            itr--;
            int x = *itr;
            if (x > a[i]) {
                big = true;
                st.erase(x);
            }
            else if (x == a[i]) {
                st.erase(x);
            }
            else {
                return false;
            }
            if (x == p) st.insert(q);
        }
        else {
            auto itr = st.end();
            if (itr == st.begin()) return false;
            itr--;
            int x = *itr;
            st.erase(x);
            if (x == p) st.insert(q);
        }
    }
    if (not big) return false;
    return true;
}

vi b;

bool check(int mid) {
    set<int> st;
    rep (i, n) {
        if (i != q) st.insert(i);
    }

    rep (i, mid) {
        if (st.count(a[i]) == 0) {
            return false;
        }
        st.erase(a[i]);
        b[i] = a[i];
        if (a[i] == p) st.insert(q);
    }

    bool big = false;
    for (int i = mid; i < n; i++) {
        if (not big) {
            auto itr = st.end();
            if (itr == st.begin()) {
                return false;
            }
            itr--;
            if (*itr < a[i]) {
                return false;
            }
            bool flag = false;
            if (*itr != a[i]) {
                itr = st.lower_bound(a[i] + 1);
                flag = true;
            }

            if (flag and itr != st.end()) {
                int x = *itr;
                st.erase(itr);
                assert(x > a[i]);
                b[i] = x;
                if (x == p) st.insert(q);
                big = true;
            }
            else {
                int x = a[i];
                st.erase(x);
                b[i] = x;
                if (x == p) st.insert(q);
            }
        }
        else {
            auto itr = st.begin();
            int x = *itr;
            st.erase(itr);
            b[i] = x;
            if (x == p) st.insert(q);
        }
    }
    if (not big) return false;
    return true;
}

signed main() {
    scanf("%d %d %d", &n, &p, &q);
    p--; q--;
    a.resize(n);
    b.resize(n);
    rep (i, n) {
        scanf("%d", &a[i]);
        a[i]--;
    }

    if (not check1()) {
        cout << -1 << endl;
        return 0;
    }

    int ok = 0, ng = n;
    set<int> st;
    rep (i, n) {
        if (i != q) st.insert(i);
    }
    rep (i, n) {
        auto itr = st.lower_bound(a[i] + 1);
        if (itr != st.end()) {
            ok = i;
            DEBUG(ok);
        }
        if (st.count(a[i]) == 0) break;
        st.erase(a[i]);
        if (a[i] == p) st.insert(q);
    }

    // while (ok + 1 < ng) {
    //     int mid = (ok + ng) / 2;
        
    //     if (not check(mid)) ng = mid;
    //     else ok = mid;
    // }

    check(ok);
    rep (i, n) {
        cout << b[i] + 1 << " ";
    }
    cout << endl;
}