#include <bits/stdc++.h>
using namespace std;
#define int long long
#define inf 0x3F3F3F3F3F3F3F3F
const int MXN = 1e6 + 5;
vector<int> adj[MXN];
int used[MXN];
vector<int> o;
void tp(int a)
{
used[a] = 1;
for (int &v : adj[a])
{
if (!used[v]) tp(v);
}
o.push_back(a);
}
void _()
{
int x, y;
cin >> x >> y;
int res = 0, cur = 0;
while (!(cur == 0 && res > 0))
{
int k = (y - cur + x - 1) / x;
res = max(res, k * x + cur);
cur = (cur + k * x) % y;
}
for (int i = 0; i < res; i++) adj[i].clear(), used[i] = 0;
o.clear();
for (int i = 0; i < res; i++)
{
if (i + x < res) adj[i + x].push_back(i);
if (i + y < res) adj[i].push_back(i + y);
}
for (int i = 0; i < res; i++)
{
if (!used[i]) tp(i);
}
reverse(o.begin(), o.end());
int val[res];
for (int i = 0; i < res; i++) val[o[i]] = i;
for (int i = res - 1; i >= 1; i--) val[i] -= val[i - 1];
cout << res - 1 << '\n';
for (int i = 1; i < res; i++) cout << val[i] << ' ';
cout << '\n';
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int t;
cin >> t;
while (t--)
{
_();
}
}
