#include<cstdio>
#include<cstring>
#include<vector>
#include<iostream>
#include<algorithm>
#define MAX 25000
using namespace std;
int par[1009];
vector<int>cost;
struct node
{
int x,y,weight;
} arr[MAX];
int khoj_rep(int r)
{
if(par[r]==r)
{
return r;
}
else
{
return par[r]=khoj_rep(par[r]);
}
}
bool cmp(node lhs,node rhs)
{
return lhs.weight<rhs.weight;
}
int main()
{
int koyta_node,koyta_edge,i,j,k,counter,u,v,sum;
while(cin>>koyta_node>>koyta_edge)
{
if(koyta_node==0 && koyta_edge==0)
{
break;
}
for(i=0; i<koyta_node; i++)
{
par[i]=i;
}
for(i=0; i<koyta_edge; i++)
{
cin>>arr[i].x>>arr[i].y>>arr[i].weight;
}
sort(arr,arr+koyta_edge,cmp);
counter=0;
sum=0;
for(j=0; j<i; j++)
{
u=khoj_rep(arr[j].x);
v=khoj_rep(arr[j].y);
if(u!=v)
{
par[u]=v;
sum+=arr[j].weight;
}
if(u==v)
{
counter++;
cost.push_back(arr[j].weight);
}
}
if(counter>0)
{
for(k=0; k<counter; k++)
{
cout<<cost[k];
if(k<counter-1)
{
cout<<" ";
}
}
}
else
{
cout<<"forest";
}
cout<<endl;
memset(par,0,sizeof(par));
cost.clear();
}
return 0;
}
#include<cstring>
#include<vector>
#include<iostream>
#include<algorithm>
#define MAX 25000
using namespace std;
int par[1009];
vector<int>cost;
struct node
{
int x,y,weight;
} arr[MAX];
int khoj_rep(int r)
{
if(par[r]==r)
{
return r;
}
else
{
return par[r]=khoj_rep(par[r]);
}
}
bool cmp(node lhs,node rhs)
{
return lhs.weight<rhs.weight;
}
int main()
{
int koyta_node,koyta_edge,i,j,k,counter,u,v,sum;
while(cin>>koyta_node>>koyta_edge)
{
if(koyta_node==0 && koyta_edge==0)
{
break;
}
for(i=0; i<koyta_node; i++)
{
par[i]=i;
}
for(i=0; i<koyta_edge; i++)
{
cin>>arr[i].x>>arr[i].y>>arr[i].weight;
}
sort(arr,arr+koyta_edge,cmp);
counter=0;
sum=0;
for(j=0; j<i; j++)
{
u=khoj_rep(arr[j].x);
v=khoj_rep(arr[j].y);
if(u!=v)
{
par[u]=v;
sum+=arr[j].weight;
}
if(u==v)
{
counter++;
cost.push_back(arr[j].weight);
}
}
if(counter>0)
{
for(k=0; k<counter; k++)
{
cout<<cost[k];
if(k<counter-1)
{
cout<<" ";
}
}
}
else
{
cout<<"forest";
}
cout<<endl;
memset(par,0,sizeof(par));
cost.clear();
}
return 0;
}
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