#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double lf;
typedef unsigned long long ull;
typedef pair<ll,int>P;
const int inf = 0x7f7f7f7f;
const ll INF = 1e16;
const int N = 2e5+10;
const ull base = 131;
const ll mod =  1e9+7;
const double PI = acos(-1.0);
const double eps = 1e-4;

inline int read(){int x=0,f=1;char ch=getchar();while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}return x*f;}
inline string readstring(){string str;char s=getchar();while(s==' '||s=='\n'||s=='\r'){s=getchar();}while(s!=' '&&s!='\n'&&s!='\r'){str+=s;s=getchar();}return str;}
int random(int n){return (int)(rand()*rand())%n;}
void writestring(string s){int n = s.size();for(int i = 0;i < n;i++){printf("%c",s[i]);}}


int a[N];
int b[N],c[N];

void solve(){
    int n = read();
    memset(b,0,sizeof b);
    memset(c,0,sizeof c);
    set<int>st1,st2;
    for(int i = 1;i <= n;i++){
        st1.insert(i);
        st2.insert(i);
    }
    for(int i = 1;i <= n;i++){
        a[i] = read();
    }
    b[1] = c[1] = a[1];
    st1.erase(a[1]);
    st2.erase(a[1]);
    for(int i = 2;i <= n;i++){
        if(a[i] != a[i-1]){
            b[i] = c[i] = a[i];
            st1.erase(a[i]);
            st2.erase(a[i]);
        }
    }


    for(int i = 1;i <= n;i++){
        if(b[i] == 0){
            int x = *st1.begin();
            b[i] = x;
            //cout<<x<<endl;
            st1.erase(x);
        }

        if(c[i] == 0){
            auto it = st2.upper_bound(c[i-1]);
            it--;
            c[i] = *it;
            st2.erase(c[i]);
        }

    }


    for(int i = 1;i <= n;i++){
        printf("%d ",b[i]);
    }
    puts("");
    for(int i = 1;i <= n;i++){
        printf("%d ",c[i]);
    }
    puts("");

}
int main(){
    int t = read();
    while(t--){
        solve();
    }
    return 0;
}

