#include <fstream>
#include <vector>
using namespace std;
ifstream fin("date.in");
ofstream fout("date.out");
struct muchie
{
    int i,j;
};

vector<int> V[50];//listele de adiacenta
int n,m;//noduri/muchii
int s; //vf de pornire
int p[50];//vizitat/nevizitat

void citire()
{
   int x,y,i;
   fin>>n>>m;
   for(i=1;i<=m;i++)
   {
       fin>>x>>y;
       V[x].insert(V[x].end(),y); //V[x].push_back(y);
       V[y].insert(V[y].end(),x); //V[y].push_back(x);
   }
   fin>>s;
}

void DF(int k)
{
    fout<<k<<" ";
    p[k]=1;
    for(int i=0;i<V[k].size();i++)
        if(!p[V[k][i]])
           DF(V[k][i]);
}

int main()
{
    citire();
    DF(s);
    fin.close();
    fout.close();
    return 0;
}