/**
*Prob	: coconuts
*Data	: 2012-7-4
*Sol	: 模拟
*/

#include <cstdio>
#include <cstring>
#include <algorithm>

using namespace std;

struct node {
	int x,h;
} ans[1010];
int n;
int num[3010][1010];
int h[3010],w[3010];

void Find(int k,int x,int we)
{
	int nowx = x,nowh = h[x]+1;
	while (true) {
		if (h[x-1]>=nowh-1&&h[x+1]>=nowh-1) {
			num[nowx][nowh] = k;
			h[nowx] = nowh;
			ans[k].x = nowx; ans[k].h = nowh;
			break;
		}
		//左右都空
		if (h[x-1]<nowh-1&&h[x+1]<nowh-1) {
			//重
			int nw = w[num[nowx][nowh-1]];
			if (we > nw) {
				Find(num[nowx][nowh-1],nowx+1,nw);
				nowh--;
			}
			if (we < nw) {
				nowh--; nowx--;
			}
		}
		//左空
		if (h[x-1]<nowh-1&&h[x+1]>=nowh-1) {
			int nw = w[num[nowx][nowh-1]];
			if (we > nw) {
				Find(num[nowx][nowh-1],nowx-1,nw);
				num[nowx][--nowh] = k;
				ans[k].x = nowx; ans[k].h = nowh;
			}
			if (we < nw) {
				nowh--; nowx--;
			}
		}
		//右空
		if (h[x+1]<nowh-1&&h[x-1]>=nowh-1) {
			int nw = w[num[nowx][nowh-1]];
			if (we > nw) {
				Find(num[nowx][nowh-1],nowx+1,nw);
				num[nowx][--nowh] = k;
				ans[k].x = nowx; ans[k].h = nowh;
			}
			if (we < nw) {
				nowx++; nowh--;
			}
		}
	}
}

int main()
{
	freopen("coconuts.in","r",stdin);
	freopen("coconuts.out","w",stdout);
	
	int T,p;
	scanf("%d",&T);
	for (;T>0;T--) {
		memset(w,0,sizeof(w));
		memset(num,0,sizeof(num));
		memset(h,0,sizeof(h));
		memset(ans,0,sizeof(ans));
		scanf("%d",&n);
		for (int i=1; i<=n; i++) {
			scanf("%d%d",&p,&w[i]);
			p +=1000;
			Find(i,p,w[i]);
		}
		
		for (int i=1; i<=n; i++) {
			printf("%d %d\n",ans[i].h,ans[i].x-1000);
		}
		printf("\n");
	}
	
	fclose(stdin); fclose(stdout);
	return 0;
}