///|
pub fn compact_text(input : String) -> String {
  let out = StringBuilder()
  for i in 0.. String {
  let out = StringBuilder()
  for i in 0.. 0 && i % 4 == 0 {
      out.write_char(' ')
    }
    out.write_string(compact[i:i + 1].to_owned())
  }
  out.to_string()
}

///|
fn is_letter(c : UInt16) -> Bool {
  c >= 'A' && c <= 'Z'
}

///|
fn is_digit(c : UInt16) -> Bool {
  c >= '0' && c <= '9'
}

///|
fn is_alnum(c : UInt16) -> Bool {
  is_letter(c) || is_digit(c)
}

///|
fn charset_offset(compact : String) -> Int? {
  for i in 0..