#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
#define maxnum 100100
int h[maxnum];
int val[maxnum];
int to[maxnum];
int nx[maxnum];
int sz;
int n, m;
void add(
int x,
int y,
int v)
{
to[sz] = y;
val[sz] = v;
nx[sz] = h[x];
h[x] = sz;
sz++;
}
int main()
{
while (
cin >> n >> m)
{
int x, y, v;
memset(h, -
1,
sizeof(h));
sz =
0;
for (
int i =
1;i <= n;i++)
{
cin >> x >> y >> v;
add(x, y, v);
}
for (
int i = h[x];i != -
1;i = nx[i])
{
to[i];
val[i];
}
}
return 0;
}
