code: func TrytesToASCII(trytes Trytes) (string, error) {
  	if err := ValidTrytes(trytes); err != nil {
  		return "", err
  	}
  
  	if len(trytes)%2 != 0 {
  		return "", ErrInvalidOddLength
  	}
  
  	ascii := ""
  	for i := 0; i < len(trytes); i += 2 {
  		ascii += string(strings.IndexRune(TryteAlphabet, rune(trytes[i])) + (strings.IndexRune(TryteAlphabet, rune(trytes[i+1])) * 27))
  	}
  
  	return ascii, nil
  }
docs: // TrytesToASCII converts trytes of even length to an ascii string.