#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 BF(int s)
{
    int st,dr,i,x[50],j;
    st=dr=1;
    p[s]=1;
    x[1]=s;
    while(st<=dr)
    {
        for(i=0; i<V[x[st]].size(); i++)
         {
            j=V[x[st]][i];
            if(!p[j])
                {
                    dr++;
                    x[dr]=j;
                    p[j]=1;
                }
         }
         st++;
    }
    for(i=1;i<=dr;i++) fout<<x[i]<<" ";
}

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