#include <iostream>
using namespace std;
int main() {
int t, n, m;
cin >> t;
while(t--) {
cin >> n >> m;
if(n < m) {
cout << "-1\n";
continue;
}
int beshi = (n % m);
for(int i = 1; i <= m/2; i++) {
cout << beshi << " ";
}
for(int i = m/2 + 1; i < m; ++i)
cout << n/m << " ";
cout << n/m << "\n";
}
return 0;
}
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