/media/sda-magnetic/david/Dok-15-2023-11-27/fernuni-hagen/cs-i-ii/fsm/fsm/lex-yacc-bash-etc/grammatik19.txt

statement       ->  assignment | cond | loop
assignment      ->  id := expr
cond            ->  if boolexpr then statement fi | if boolexpr then statement else statement fi
loop            ->  while boolexpr do statement od
expr            ->  boolexpr | numexpr
boolexpr        ->  numexpr cop numexpr
numexpr         ->  numexpr + term | term
term            ->  term * factor | factor
factor          ->  id | const | (numexpr)