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#include<cstdio>
#include<iostream>
#include<stdlib.h>
#include<string.h>
using namespace std;
#define MAX_SIGNAL 100000
struct stream{
    int start;
    int branch;
    int next[100000];      
};
int case_num=0;
int start_sg[MAX_SIGNAL];
int start_sg_num=0;
int stream_num=0;
int sg[MAX_SIGNAL];
int line_count[MAX_SIGNAL]={0};
stream* line[MAX_SIGNAL];
void sg_branch(int);
int main(){
    
    int i=0;    
    scanf("%d\n",&case_num);
    string output="";
    
    while(i<case_num){
        i++;
        scanf("%d %d\n",&stream_num,&start_sg_num);
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