/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/fsm/fsm/lex-yacc-bash-etc/grammatik09.txt

statement       -> assignemnt | const | loop
assignement     -> id := expr
const           -> if booexpr then statemnt fi | if boolexpr then statement else statement fi
loop            -> while boolexpr do statement od
expr            -> boolexpr | numexpr
boolexpr        -> numexpr cop numexpr
numexpr         -> numexpr + ter | term
term            -> term * factor | factor
factor          -> id | const | (numexpr)