agi script below:
#!/usr/bin/ruby

require 'rubygems'
require 'ruby-agi'


agi = AGI.new #new agi object

result0 = agi.wait_for_digit(-1)
result1 = agi.wait_for_digit(-1)
result2 = agi.wait_for_digit(-1)
result3 = agi.wait_for_digit(-1)
agi.noop(result0.digit << result1.digit << result2.digit << result3.digit)
result = result0.digit << result1.digit << result2.digit << result3.digit

agi.say_digits(result)