#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define sz size()
#define ff first
#define ss second
#define pb push_back
#define pii pair <int, int>
#define dur exit(0)
#define dur1 return(0)
const int N = 2e5 + 5;
int main () {
// freopen ("input.txt", "r", stdin);
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int t;
cin >> t;
while ( t-- ) {
int n, m;
cin >> n >> m;
int x = (n > m ? 1 : -1);
cout << max (n, m) - 1 << "\n";
for (int i = 1; i <= max (n, m) - 1; ++i) {
cout << x << " ";
}
cout << "\n";
}
}
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