#include <bits/stdc++.h>
#define int long long
#define io ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define pb push_back
using namespace std;
const int N=1e6+5,mod1=1e9+7,mod2=998244353;
typedef pair<int,int> pi;
int a[N];
mt19937_64 rng(time(0));
void solve()
{
	int s,x;
	cin>>s>>x;
	if(gcd(s,x)==1)
	{
		cout<<1<<'\n';
		cout<<s;
		return ;
	}
	else if(s%2==1&&x%2==0)
	{
		cout<<3<<'\n';
		cout<<1<<' ';
		s--;
	}
	else cout<<2<<'\n';
	while(1)
	{
		int a=rng()%(1000000000+1);
		int b=s-a;
		if(gcd(x,a)==1&&gcd(x,b)==1)
		{
			cout<<a<<' '<<b;
			return ;
		}
	}
}
signed main()
{
	io;
	int t=1;
	//cin>>t;
	while(t--)
	{
		solve();
	}
	return 0;
}