//Code to find all possible paths from given source to dest
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5;
int vis[N];

vector<int> adj[N];

vector<vector<int>> paths;
void dfs(int source,int target,vector<int> path) {
     vis[source]=1;
     path.push_back(source);
if(source==target) {
    //We have found a valid path
    //Append current path copy to paths
     paths.push_back(path);
} else {

    for(auto it:adj[source]) {
        if(vis[it]==false or it==target) {
      //     cout<<"Checking neighbour "<<it<<" of "<<source<<endl;
            dfs(it,target,path);
        }

    }
}
}

int main() {
int V,E;
cin>>V>>E;
for(int i=0;i<E;i++) {
    int x,y;
    cin>>x>>y;
    adj[x].push_back(y);
    adj[y].push_back(x);
}
int source,dest;
cin>>source>>dest;
vector<int> path;
dfs(source,dest,path);
for(auto p:paths) {
    for(auto it:p) {
        cout<<it<<" ";
    }
    cout<<endl;
}
}