#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
using namespace std;
int n, m;
vector<int> g[2005];
namespace sub1
{
int dem = 0, lu = 0;
bool kt = false;
int num[305], h[305], cha[305], low[305], pos[305];
void dfs(int i, int pa)
{
if (kt == true)
return;
dem++;
num[i] = dem;
low[i] = dem;
pos[dem] = i;
h[i] = h[pa] + 1;
cha[i] = pa;
int d = 0, luu;
for (auto j : g[i])
{
if (j == pa)
continue;
if (num[j] != 0)
{
if (num[j] == 1)
{
d++;
continue;
}
low[i] = min(low[i], low[j]);
h[i] = h[pos[low[i]]] + 1;
cha[i] = pos[low[i]];
}
}
if (d == 1)
{
if (h[i] >= 4)
{
kt = true;
lu = i;
return;
}
low[i] = 1;
h[i] = 2;
cha[i] = pos[1];
}
for (auto j : g[i])
{
if (j == pa || num[j] != 0)
continue;
dfs(j, i);
}
}
void xuly()
{
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
num[j] = 0, h[j] = 0, low[j] = 0;
dem = 0;
dfs(i, i);
if (kt == true)
{
vector<int> v;
while (lu != i)
v.push_back(lu), lu = cha[lu];
v.push_back(i);
reverse(v.begin(), v.end());
for (auto j : v)
cout << j << " ";
return;
}
}
if(n < 7)
cout << "no";
}
}
namespace full
{
int dem = 0, lu = 0;
bool kt = false;
int num[1005], h[1005], cha[1005], low[1005], pos[1005];
void dfs(int i, int pa)
{
if (kt == true)
return;
dem++;
num[i] = dem;
low[i] = dem;
pos[dem] = i;
h[i] = h[pa] + 1;
cha[i] = pa;
int d = 0, luu;
for (auto j : g[i])
{
if (j == pa)
continue;
if (num[j] != 0)
{
if (num[j] == 1)
{
d++;
continue;
}
low[i] = min(low[i], low[j]);
h[i] = h[pos[low[i]]] + 1;
cha[i] = pos[low[i]];
}
}
if (d == 1)
{
if (h[i] >= 4)
{
kt = true;
lu = i;
return;
}
low[i] = 1;
h[i] = 2;
cha[i] = pos[1];
}
for (auto j : g[i])
{
if (j == pa || num[j] != 0)
continue;
dfs(j, i);
}
}
void xuly()
{
for (int i = 1; i <= 10; i++)
{
for (int j = 1; j <= n; j++)
num[j] = 0, h[j] = 0, low[j] = 0;
dem = 0;
dfs(i, i);
if (kt == true)
{
vector<int> v;
while (lu != i)
v.push_back(lu), lu = cha[lu];
v.push_back(i);
reverse(v.begin(), v.end());
for (auto j : v)
cout << j << " ";
return;
}
}
// if/
cout << "no";
}
}
int main()
{
// if (fopen("special.inp","r")){
// freopen("special.inp","r",stdin);
// freopen("special.out","w",stdout);
// }
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
for (int i = 1; i <= m; i++)
{
int u, v;
cin >> u >> v;
g[u].push_back(v);
g[v].push_back(u);
}
if (n <= 300 && m <= 2000)
return sub1::xuly(), 0;
full::xuly();
}
