0	EQ	    		=
1	EXPRESSION	
2	OR			    or
3	AND			    and
4	COMPARE	  	<  >  <=  >=  != ==
5	ADD_SUB	  	_+_   _-_
6	MULT_DIV		*  /
7	VALUE		identificator, constant








EXPRESSION  OR  EXPRESSION
EXPRESSION  AND EXPRESSION
identificator  EQ  EXPRESSION
EXPRESSION  COMPARE   EXPRESSION
EXPRESSION  ADD_SUB  EXPRESSION
EXPRESSION  MULT_DIV  EXPRESSION
EXPRESSION  MONADIC  EXPRESSION
       
OR                           OR
AND                          AND 
EQ                           EQ
COMPARE      VALUE           COMPARE
ADD_SUB                      ADD_SUB
MULT_DIV                     MULT_DIV
MONADIC                      MONADIC
                             ;