numCases = 20
puts numCases
numCases.times do

  numInputs = rand(10) + 1 # avoid 0
  puts numInputs
  numInputs.times do

    input = []
    inputLength = rand(2000)
    inputLength.times do
      input << rand(9) + 1 # avoid 0
    end
    input << 0
    puts input.join( " " )
  end
  puts 0
end