#include <bits/stdc++.h>
using namespace std;

using ui = unsigned;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define rep(i,l,r) for(int i=(l);i<=(r);++i)
#define per(i,l,r) for(int i=(l);i>=(r);--i)
#define repn(i,n)  for(int i=0;i<(n);++i)
#define sizc(x) ((int)x.size())
#define allc(x) x.begin(),x.end()
#define fir first
#define sec second



signed main(){
    // freopen(".in","r",stdin);
    // freopen(".out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll s,x;cin>>s>>x;
    if(abs(__gcd(s,x))==1){
        cout<<"1\n"<<s<<'\n';
        return 0;
    }
    if((s&1)&&!(x&1)){
        --s;
        for(ll i=1;i<=1e9;++i){
            ll j=s-i;
            if(__gcd(i,x)==1&&abs(__gcd(j,x))==1){
                cout<<"3\n1 "<<i<<' '<<j<<'\n';
                exit(0);
            }
        }
    }
    else{
        for(ll i=1;i<=1e9;++i){
            ll j=s-i;
            if(__gcd(i,x)==1&&abs(__gcd(j,x))==1){
                cout<<"2\n"<<i<<' '<<j<<'\n';
                exit(0);
            }
        }
    }
    cout<<"-1\n";
}