s = '0000000000'
tmp = 0
10.times{|k|
    0.upto(9){|i|
        s[9 - k] = i.to_s
        puts s
        STDOUT.flush
        x,judge = gets.chomp.split
        x = x.to_i
        if judge == 'unlocked'
            exit
        end
        if tmp < x
            tmp = x
            break
        end
        }
    }