#include <bits/stdc++.h>
using namespace std;
int d;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	int s,x;
	cin>>s>>x;
	if(__gcd(s,x)==1)
	{
		cout<<1<<endl;
		cout<<s<<endl;
	}
	else
	{
		d=s/x*x;
		s%=x;
		int tmp=0,len=2;
		if(s%2==1&&x%2==0)
		{
			tmp=1+d;
			len++;
			s--;
			d=0;
		}
		int y,z;
		while(1)
		{
			y=rand()%(x+1);
			if(__gcd(y,x)==1&&abs(__gcd(s-y,x))==1)
			{
				z=s-y;
				y=y+d;
				if(y>1000000000)
				{
					z=z+(y-1000000000)/x*x;
					y=y-(y-1000000000)/x*x;
					if(y>1000000000)
					{
						y-=x;
						z+=x;
					}
					if(z>1000000000)
					{
						cout<<-1<<endl;
						return 0;
					}
				}
				cout<<len<<endl;
				if(len==2)
				{
					cout<<y<<" "<<z<<endl;
				}
				else
				{
					cout<<tmp<<" "<<y<<" "<<z<<endl;
				}
				return 0;
			}
		}
	}
	return 0;
}