#include "bits/stdc++.h" using namespace std; typedef long long ll; #define F(i,l,r) for(ll i=l,i_end=r;i<i_end;++i) #define FR(i,l,r) for(ll i=l,i_end=r;i>=i_end;--i) const ll mod=998244353; const ll maxn=1e5*4; void solve(){ int n,s; cin>>n>>s; cout<<"-1\n"; } signed main() { ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); int tt=1; //cin>>tt; while(tt--)solve(); return 0; }