code: function decode (str) {
    return str.trim().split(' ').map((s) => {
      if (s.charCodeAt(0) - 0x2800 > 127) return s
      return String.fromCharCode(s.charCodeAt(0) - 0x2800)
    }).join('')
  }
docs: decode brail back to utf8
  @method decode
  @param  {String} str - brail string
  @return {String} - utf8 decoded string