// editor3
#include<stdio.h>
#include<stdlib.h>
int **graph,*visited,n,m;
void dfs(int v)
{
    visited[v]=1;
    printf("%d ",v);
    for(int i=0;i<n;i++)
    {
        if(graph[i][v]!=0&&visited[i]==0)
        {
            dfs(i);
        }
    }
}
int main()
{
    int u,v,w,s;
    scanf("%d%d",&n,&m);
    graph=(int**)malloc(n,sizeof(int*));
    for(int i=0;i<n;i++)
    {
        graph[i]=(int*)calloc(n,sizeof(int));
    }
    for(int i=0;i<n;i++)
    {
        scanf("%d%d%d",&u,&v,&w);
        graph[u][v]=w;
    }
    scanf("%d",&s);
    printf("DFS Traversal starting from vertex %d: ",s);
    dfs(s);
}