t = read_line.to_i64
t.times do
  n, x = read_line.split.map &.to_i64
  a = [*(1..n)].reverse
  if a.sum <= x
    t = x - a.sum
    k = t // n
    r = t - k * n
    n.times do |i|
      a[i] += k
      a[i] += 1 if i < r
    end
    puts a.join(' ')
  else
    puts -1
  end
end