def createPhoneNumber(numbers)
  phoneNumber = "("

  (0..2).each do |i|
    phoneNumber += numbers[i].to_s
  end

  phoneNumber += ") "

  (3..5).each do |i|
    phoneNumber += numbers[i].to_s
  end

  phoneNumber += "-"

  (6..9).each do |i|
    phoneNumber += numbers[i].to_s
  end

  phoneNumber
end