//Let's join Kaede Takagaki Fan Club !!
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define rng(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define si(x) int(x.size())
template<class t> using vc=vector<t>;
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
using ull=unsigned;

ull _sm[256][256];
template<bool is_pre = false>
ull nim_product(ull a, ull b, int k = 32){
	if(min(a, b) <= 1) return a*b;
	if(!is_pre and k <= 8) return _sm[a][b];
	k >>= 1;
	
	ull au = (a>>k), al = a & (((ull)1<<k)-1);
	ull bu = (b>>k), bl = b & (((ull)1<<k)-1);
	
	ull go1 = nim_product<is_pre>(au, bu, k);
	ull go2 = nim_product<is_pre>(al, bl, k);
	ull go3 = nim_product<is_pre>(au^al, bu^bl, k);
	
	return ((go2^go3)<<k)^nim_product(go1, ((ull)1<<(k-1)), k)^go2;
}
void init_np(){
	rep(a,256)rep(b,256) _sm[a][b]=nim_product<true>(a,b,8);
}
constexpr int NL=150;
ull dp[3*NL+5][NL+5][4], cs[NL+5][NL+5];
int n,m,x,y,z;
bool bad[NL+5][NL+5], rem[NL+5];

int main(){
	ios::sync_with_stdio(0);
	init_np();
	
	cin>>n>>m;
	cin>>x>>y>>z; x--;y--;z--;
	rep(i,n) bad[i][i]=true;
	rep(i,m){
		int a,b;cin>>a>>b;
		a--;b--;
		bad[a][b]=bad[b][a]=true;
	}
	rep(i, n) rep(j, i) if(!bad[i][j]){
		cs[i][j] = cs[j][i] = mt()>>32;
	}
	int goal = x, need = -1, M = 3;
	vc<int>ans{x};
	rem[x] = true;
	while(need != 1){
		memset(dp, 0, sizeof(dp));
		dp[x][1][0] = 1;
		
		repn(len, n){
			rep(state, 3*n){
				rep(mask, 4){
					if(dp[state][len][mask] == 0) continue;
					
					int pre=-1, now=state;
					if(state>=n){
						pre=state%n;
						if(state/n==1)now=y;
						else now=z;
					}
					rep(nxt, n){
						if(pre == nxt or rem[nxt] or bad[now][nxt]) continue;
						if(nxt == y and (mask&1)) continue;
						if(nxt == z and (mask&2)) continue;
						
						int nstate = nxt, nmask = mask;
						if(nxt == y) nstate = n+now, nmask|=1;
						else if(nxt == z) nstate = n+n+now, nmask|=2;
						dp[nstate][len+1][nmask] ^= nim_product(dp[state][len][mask], cs[now][nxt]);
					}
				}
			}
			if(need == -1 or need == len){
				rep(now, n){
					if(bad[now][goal] or rem[now]) continue;
					int lb=now, ub=now;
					if(now == y) lb=n, ub=2*n-1;
					else if(now == z) lb = 2*n, ub=3*n-1;
					
					rng(state, lb, ub+1){
						if(dp[state][len][M]){
							ans.pb(now);
							need = len-1;
							if(now==y) M^=1;
							else if(now==z) M^=2;
							goal = now;
							rem[goal] = true;
							goto nxt;
						}
					}
				}
			}
		}
		cout<<-1<<'\n';
		return 0;
		nxt:;
	}
	cout<<si(ans)<<'\n';
	for(auto e:ans) cout << ++e << " ";
	cout<<++x<<'\n';
}