#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>
using namespace std;
const long long oo = 1000000000000000000;
long long int sum, ans = 0, mx = 0, mn = 1000000000, num, pos;
/*
ViHHiPuh
(( `'-""``""-'` ))
)-__-_.._-__-(
/ --- (o _ o) --- \
\ .-* ( .0. ) *-. /
_'-. ,_ '=' _, .-'_
/ `;#'#'# - #'#'#;` \
\_)) -----'#'----- ((_/
# --------- #
'# ------- ------ #'
/..-'# ------- #'-.\
_\...-\'# -- #'/-.../_
((____)- '#' -(____))
cout << fixed << setprecision(6) << x;
freopen ( "sum.in", "r", stdin )
*/
int main () {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int t;
cin >> t;
int n, m;
while ( t -- ) {
cin >> n >> m;
if ( n > m ) {
cout << n - 1 << "\n";
for ( int i = 1; i < n; i ++ )
cout << 1 << " ";
}
else {
cout << m - 1 << "\n";
for ( int i = 1; i < m; i ++ )
cout << -1 << " ";
}
cout << "\n";
}
}
