Grammar automate;
Lexer
  letter = 'a'..'z';
  digit = '0'..'9';
  id = letter(letter|digit)*;
  if = 'if';
  int = (digit)+;
  float = (digit)+ '.' (digit)+;
  dot = '.';
  blank = #10|#13|#32;
Parser
  Ignored blank;
  p = t*;
  t = id | if | int | float | dot;