*SUPPORT*
IN: wif tufa gazzer lug OUT: RED GREEN YELLOW
IN: lug gazzer OUT: GREEN RED
IN: gazzer zup wif zup lug OUT: GREEN YELLOW RED
IN: gazzer blicket fep wif wif tufa lug OUT: GREEN BLUE YELLOW YELLOW RED
IN: wif gazzer OUT: YELLOW RED
IN: fep tufa lug fep OUT: GREEN BLUE BLUE
IN: lug OUT: GREEN
IN: fep blicket gazzer zup fep OUT: BLUE RED BLUE
IN: lug blicket fep fep fep tufa fep OUT: BLUE BLUE BLUE BLUE GREEN
IN: lug fep zup wif zup wif OUT: YELLOW YELLOW GREEN BLUE
IN: wif tufa fep tufa wif OUT: YELLOW BLUE YELLOW
IN: wif blicket fep OUT: BLUE YELLOW
IN: lug tufa wif blicket lug OUT: GREEN YELLOW GREEN
IN: lug gazzer zup lug OUT: GREEN GREEN RED

*QUERY*
IN: wif OUT: YELLOW
IN: wif wif OUT: YELLOW YELLOW
IN: gazzer blicket lug zup gazzer tufa wif OUT: YELLOW RED GREEN RED
IN: lug zup gazzer OUT: RED GREEN
IN: wif zup wif tufa wif OUT: YELLOW YELLOW YELLOW
IN: wif blicket wif OUT: YELLOW YELLOW
IN: fep blicket wif OUT: YELLOW BLUE
IN: fep OUT: BLUE
IN: fep blicket gazzer OUT: RED BLUE
IN: wif wif fep zup fep OUT: BLUE YELLOW YELLOW BLUE

*GRAMMAR*
wif -> YELLOW 
 gazzer -> RED 
 lug -> GREEN 
 fep -> BLUE 
 u1 blicket x1 -> [x1] [u1] 
 x1 zup u1 -> [u1] [x1] 
 x1 tufa x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 