# initial array of characters/strings to shift back to the left with [index-1]
  KEYBOARD_ROWS= [
    '`1234567890-=',
    'qwertyuiop[]\\', # need to escape the backslash or else debugging pain
    "asdfghjkl;'", # double-quotes here because single quote embedded
    'zxcvbnm,./',
    '~!@#\$%^&*()_+',
    'QWERTYUIOP{}|',
    'ASDFGHJKL:"',
    'ZXCVBNM<>?'
  ].join

# puts '\\~-'.tr('\\', 'a') # doesn't match because \ is passed to tr and not escaped
a~-
# puts '\\~-'.tr('\\\\', 'a') # now \\ is passed to tr, which is
a~-
# puts '\\~-'.tr("\\\\\\", 'a') # with double quotes, you need an extra pair, for 6 total.
a~-
# puts '\\~-'.tr('\\~', 'b') # the escaping backslash needs to be doubled
\b-
# puts '\\~-'.tr("\\\~", 'b') # the escaping backslash needs to be tripled
\b-
# puts '\\~-'.tr('\\-', 'c') # the escaping backslash needs to be doubled
\~c
# puts '\\~-'.tr("\\\-", 'c') # the escaping backslash needs to be tripled
\~c

  SHIFTED_KEYBOARD_ROWS =
    [
      '1234567890\\-=',
      'wertyuiop[]\\\\', # 4x backslash = backslash
      "sdfghjkl;'",
      'xcvbnm,./',
      '!@#\$%\^&*()_+',
      'WERTYUIOP{}|',
      'SDFGHJKL:"',
      'XCVBNM<>?'
  ].join

  UNSHIFTED_KEYBOARD_ROWS= [
    '`1234567890\-',
    'qwertyuiop[]', # need to escape the backslash or else debugging pain
    'asdfghjkl;',
    'zxcvbnm,.',
    '~!@#\$%\^&*()_',
    'QWERTYUIOP{}',
    'ASDFGHJKL:',
    'ZXCVBNM<>?'
  ].join

  def self.translate(string)
    string.tr(SHIFTED_KEYBOARD_ROWS, UNSHIFTED_KEYBOARD_ROWS)
  end