-- Author: Hannes du Plooy
-- Date: 8 October 2013
-- Objective: To solve the following
--  ONE
--  ONE
--  ONE
-- +ONE
-- ----
--  TEN

done = false
for O=1,2 do
    for E=0,9 do
        if (O ~= E) then
            tmp = E*4
            carry = math.floor(tmp/10)
            N = tmp % 10
            if (N ~= O and N ~= E) then
                tmp = carry + N*4
                carry = math.floor(tmp/10)
                E2 = tmp % 10
                if (E2 == E) then
                    T = carry + O*4
                    if (T < 10) then
                        if (T ~= O and T ~= E and T ~= N) then
                            print("Answer is \n")
                            print(" " .. O .. N .. E)
                            print(" " .. O .. N .. E)
                            print(" " .. O .. N .. E)
                            print("+" .. O .. N .. E)
                            print("----")
                            print(" " .. T .. E .. N)
                            done = true
                            break
                        end
                    end
                end
            end
        end
    end
    if done then break end
end