#include<iostream>
#include<algorithm>
#include<cstring>
#include<cstdio>
#include<bitset>
#include<cmath>
#include<ctime>
#include<queue>
#include<map>
#include<set>

#define fi first
#define se second
#define max Max
#define min Min
#define abs Abs
#define lc (x<<1)
#define rc (x<<1|1)
#define mid ((l+r)>>1)
#define pb(x) push_back(x)
#define lowbit(x) (x&(-x))
#define fan(x) (((x-1)^1)+1)
#define mp(x,y) make_pair(x,y)
#define clr(f,n) memset(f,0,sizeof(int)*(n))
#define cpy(f,g,n) memcpy(f,g,sizeof(int)*(n))
#define INF 0x3f3f3f3f

using namespace std;

inline int read()
{
	int ans=0,f=1;
	char c=getchar();
	while(c>'9'||c<'0'){if(c=='-')f=-1;c=getchar();}
	while(c>='0'&&c<='9'){ans=(ans<<1)+(ans<<3)+c-'0';c=getchar();}
	return ans*f;
}

inline void write(int x)
{
	if(x<0) putchar('-'),x=-x;
	if(x/10) write(x/10);
	putchar((char)(x%10)+'0');
}

template<typename T>inline T Abs(T a){return a>0?a:-a;};
template<typename T,typename TT>inline T Min(T a,TT b){return a<b?a:b;}
template<typename T,typename TT> inline T Max(T a,TT b){return a<b?b:a;}

const int N=2005;
int t,n,sg[N][N];

struct Node
{
	int x,y;
}a[N];

bitset<N> p1[2][N],p2[2][N],p3,tmp;

inline void init(int x)
{
	for(int i=1,I=1;i<=x;++i,I^=1)
	{
		p3.reset();
		for(int j=1;j<=x;++j)
		{
			p1[I][j].reset();
			p2[I][j].reset();
		}
		if(i==1)
		{
			p1[1][1][0]=1;
			p2[1][1][0]=1;
			p3[0]=1;
		}
		for(int j=1;j<=x;++j)
		{
			if(i==1&&j==1) continue;
			tmp=(p1[I^1][j]|p2[I^1][j-1]|p3);
			if(i>=3&&j>=2) tmp[sg[i-2][j-1]]=1;
			if(j>=3&&i>=2) tmp[sg[i-1][j-2]]=1;
			sg[i][j]=(~tmp)._Find_first();
			p1[I][j]=p1[I^1][j];p1[I][j][sg[i][j]]=1;
			p2[I][j]=p2[I^1][j-1];p2[I][j-1][sg[i][j]]=1;
			p3[sg[i][j]]=1;
		}
	}
}

struct Ans
{
	int x,y,z;
	bool operator < (const Ans &p)const
	{
		if(x==p.x)
		{
			if(y==p.y)
				return z<p.z;
			return y<p.y;
		}
		return x<p.x;
	}
}ans;

signed main()
{
	init(2000);
	t=read();
	while(t--)
	{
		n=read();int SG=0;
		for(int i=1;i<=n;++i)
		{
			a[i].x=read();
			a[i].y=read();
			SG^=sg[a[i].x][a[i].y];
		}
		if(SG==0)
			puts("-1 -1 -1");
		else
		{
			ans=(Ans){INF,INF,INF};
			for(int i=1;i<=n;++i)
			{
				int SSG=(SG^sg[a[i].x][a[i].y]);
				for(int j=1;j<a[i].x;++j)
					if(sg[j][a[i].y]==SSG)
						ans=min(ans,(Ans){i,j,a[i].y});
				for(int j=1;j<a[i].y;++j)
					if(sg[a[i].x][j]==SSG)
						ans=min(ans,(Ans){i,a[i].x,j});
				for(int j=1;j<min(a[i].x,a[i].y);++j)
					if(sg[a[i].x-j][a[i].y-j]==SSG)
						ans=min(ans,(Ans){i,a[i].x-j,a[i].y-j});
				if(a[i].x>=3&&a[i].y>=2&&sg[a[i].x-2][a[i].y-1]==SSG) ans=min(ans,(Ans){i,a[i].x-2,a[i].y-1});
				if(a[i].x>=2&&a[i].y>=3&&sg[a[i].x-1][a[i].y-2]==SSG) ans=min(ans,(Ans){i,a[i].x-1,a[i].y-2});
			}
			printf("%d %d %d\n",ans.x,ans.y,ans.z);
		}
	}
	return 0;
}