#include
int m,n;
bool w[100][100],visited[100];
void dfs(int i){
visited[i] = true;
printf("%d ",i);
for(int j = 0;j
dfs(j);
}
int main(){
scanf("%d%d",&m,&n);
int a,b;
for(int i = 0;i
w[a][b] = w[b][a] = true;
}
for(int i = 0;i
dfs(i);
return 0;
}