#include<bits/stdc++.h>
using namespace std;
namespace my_std{
	#define ll long long
	#define bl bool
	ll my_pow(ll a,ll b,ll mod){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res=(res*a)%mod;
			a=(a*a)%mod;
			b>>=1;
		}
		return res;
	}
	ll qpow(ll a,ll b){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res*=a;
			a*=a;
			b>>=1;
		}
		return res;
	}
	#define db double
	#define pf printf
	#define pc putchar
	#define fr(i,x,y) for(register ll i=(x);i<=(y);i++)
	#define pfr(i,x,y) for(register ll i=(x);i>=(y);i--)
	#define go(u) for(ll i=head[u];i;i=e[i].nxt)
	#define enter pc('\n')
	#define space pc(' ')
	#define fir first
	#define sec second
	#define MP make_pair
	#define il inline
	#define inf 8e18
	#define random(x) rand()*rand()%(x)
	#define inv(a,mod) my_pow((a),(mod-2),(mod))
	il ll read(){
		ll sum=0,f=1;
		char ch=0;
		while(!isdigit(ch)){
			if(ch=='-') f=-1;
			ch=getchar();
		}
		while(isdigit(ch)){
			sum=sum*10+(ch^48);
			ch=getchar();
		}
		return sum*f;
	}
	il void write(ll x){
		if(x<0){
			x=-x;
			pc('-');
		}
		if(x>9) write(x/10);
		pc(x%10+'0');
	}
	il void writeln(ll x){
		write(x);
		enter;
	}
	il void writesp(ll x){
		write(x);
		space;
	}
}
using namespace my_std;
ll t,n,a[110],b[110];
string opt;
void encode(){
	t=read();
	while(t--){
		n=read();
		fr(i,1,n) a[i]=read();
		sort(a+1,a+n+1);
		ll sum=0,l=1,r=n,cnt=0;
		fr(i,1,n) sum^=a[i];
		fr(i,0,8){
			if(sum&(1ll<<i)){
				b[++cnt]=a[r--];
				b[++cnt]=a[r--];
			}
			else{
				b[++cnt]=a[l++];
				b[++cnt]=a[l++];
			}
		}
		if(sum&256) b[++cnt]=a[l++];
		else b[++cnt]=a[r--];
		fr(i,l,r) b[++cnt]=a[i];
		fr(i,1,n) writesp(b[i]);
		enter;
	}
}
void decode(){
	t=read();
	while(t--){
		n=read();
		fr(i,1,n) a[i]=read();
		fr(i,1,18) b[i]=a[i]>a[i+1];
		ll cnt=0,pos=0,tmp=0,sum=0;
		b[0]=-1;
		fr(i,1,18){
			if(b[i]!=b[i-1]){
				if(cnt&1) pos=i;
				cnt=1;
			}
			else cnt++;
		}
		fr(i,1,n) sum^=a[i];
		if(pos) pfr(i,17,pos-1) b[i+1]=b[i];
		fr(i,0,8) if(b[i*2+1]) tmp|=1ll<<i;
		if(tmp!=sum) a[++n]=tmp^sum;
		fr(i,1,n) writesp(a[i]); 
		enter;
	}
}
int main(){
	cin>>opt;
	if(opt=="transmit") encode();
	else decode();
}