#include<bits/stdc++.h>
//ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//clock_t start=clock();clock_t end=clock();cout<<(double)(end-start)/CLOCKS_PER_SEC<<endl;
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int ui;
typedef pair<int,int> pii;
typedef pair<pii,int> ppii;
typedef pair<int,pii> pipi;
typedef pair<ll,ll> pll;
typedef pair<pll,ll> ppll;
typedef pair<ll,pll> plpl;
typedef pair<pii,pii> P;
typedef tuple<ll,ll,ll> tl;
typedef pair<double,double> pdd;
typedef vector<vector<ll>> mat;
ll mod=1000000007;
ll mod2=998244353;
ll mod3=1000003;
ll mod4=998244853;
ll mod5=1000000009;
ll inf=1LL<<62;
double pi=3.141592653589793238462643383279L;
double eps=1e-14;
#define rep(i,m,n) for(int i=m;i<n;i++)
#define rrep(i,n,m) for(ll i=n;i>=m;i--)
#define srep(itr,st) for(auto itr=st.begin();itr!=st.end();itr++)
#define mrep(itr,mp) for(auto& itr:mp)
#define Max(a,b) a=max(a,b)
#define Min(a,b) a=min(a,b)
int dh[4]={1,-1,0,0};
int dw[4]={0,0,1,-1};
int ddh[8]={-1,-1,-1,0,0,1,1,1};
int ddw[8]={-1,0,1,-1,1,-1,0,1};
struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
#define umh unordered_map<ll,ll,custom_hash>
ll gcd(ll a,ll b){
    if(a<b)swap(a,b);
    if(b==0)return a;
    if(a%b==0)return b;
    return gcd(b,a%b);
}
ll lcm(ll a,ll b){
    ll c=gcd(a,b);
    return a*b/c;
}
ll Pow(ll n,ll k){
    ll ret=1;
    ll now=n;
    while(k>0){
        if(k&1)ret*=now;
        now*=now;
        k/=2;
    }
    return ret;
}
ll beki(ll n,ll k,ll md){
  ll ret=1;
  ll now=n;
    now%=md;
  while(k>0){
    if(k%2==1){
      ret*=now;
      ret%=md;
    }
    now*=now;
    now%=md;
    k/=2;
  }
  return ret;
}
ll gyaku(ll n,ll md){
  return beki(n,md-2,md);
}
ll poc(ll n){
    ll ret=0;
    ll u=n;
    while(u>0){
        ret+=u%2;
        u/=2;
        
    }
    return ret;
}



int main(){
    ios::sync_with_stdio(false);cin.tie(0);
    ll n,p,q;cin>>n>>p>>q;
    ll a[n];
    rep(i,0,n)cin>>a[i];
    bool bo[n];
    fill(bo,bo+n,false);
    bo[n-1]=true;
    rrep(i,n-2,0){
        if(a[i]>a[i+1])bo[i]=true;
        else{
            break;
        }
    }
    vector<ll> ans;
    set<ll> st;
    rep(i,1,n+1)st.insert(i);
    rep(i,0,n-1){
        if(bo[i+1]){
            ll now=a[i]+1;
            if(now==n+1){
                cout<<-1<<endl;
                return 0;
            }
            if(now==p){
                ans.push_back(now);
                st.erase(now);
                srep(itr,st)ans.push_back(*itr);
                
            }
            else if(now==q){
                now++;
                if(now==n+1){
                    cout<<-1<<endl;
                    return 0;
                }
                ans.push_back(now);
                st.erase(now);
                srep(itr,st)ans.push_back(*itr);
                
            }
            else{
                ans.push_back(now);
                st.erase(now);
                srep(itr,st){
                    ans.push_back(*itr);
                }
            }
            ll n1,n2;
            rep(j,0,ans.size()){
                if(ans[j]==p)n1=j;
                else if(ans[j]==q)n2=j;
            }
            if(n1>n2){
                rep(j,n2,n1)ans[j]=ans[j+1];
                ans[n1]=q;
            }
            
            break;
        }
        else{
            ll now=a[i];
            if(now==q){
                now++;
                if(now==n+1){
                    cout<<-1<<endl;
                    return 0;
                }
                ans.push_back(now);
                st.erase(now);
                srep(itr,st)ans.push_back(*itr);
                ll n1,n2;
                rep(j,0,ans.size()){
                    if(ans[j]==p)n1=j;
                    else if(ans[j]==q)n2=j;
                }
                if(n1>n2){
                    rep(j,n2,n1)ans[j]=ans[j+1];
                    ans[n1]=q;
                }
                break;
            }
            else if(now==p){
                ans.push_back(now);
                st.erase(now);
                rrep(j,i+1,n){
                    if(bo[j+1]){
                        ll ne=a[j]+1;
                        if(ne==n+1){
                            cout<<-1<<endl;
                            return 0;
                        }
                        ans.push_back(now);
                        st.erase(now);
                        srep(itr,st)ans.push_back(*itr);
                        break;
                    }
                    else{
                        ans.push_back(a[j]);
                        st.erase(a[j]);
                    }
                }
                ll n1,n2;
                rep(j,0,ans.size()){
                    if(ans[j]==p)n1=j;
                    else if(ans[j]==q)n2=j;
                }
                if(n1>n2){
                    rep(j,n2,n1)ans[j]=ans[j+1];
                    ans[n1]=q;
                }
                break;
            }
            else{
                ans.push_back(a[i]);
                st.erase(a[i]);
            }
        }
    }
    rep(i,0,ans.size())cout<<ans[i]<<" ";
    cout<<endl;
}