def query(q)
    puts q*" ";STDOUT.flush
    x,y=gets.split(" ").map(&:to_i)
    exit if x==4
    return [x,y]
end


c=0
(0..9).to_a.combination(4){|ce|
    ce.permutation(4){|pe|
        x,y=query(pe)
        break if y!=4
    }
}