*SUPPORT*
IN: fep tufa lug tufa fep wif OUT: GREEN YELLOW GREEN GREEN
IN: gazzer tufa gazzer wif OUT: RED RED RED
IN: fep zup lug OUT: YELLOW YELLOW GREEN
IN: fep lug zup fep wif OUT: GREEN GREEN GREEN YELLOW GREEN GREEN GREEN YELLOW
IN: gazzer OUT: RED
IN: lug lug zup lug wif OUT: YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW
IN: fep tufa dax OUT: GREEN PURPLE
IN: gazzer zup lug OUT: YELLOW YELLOW RED
IN: dax zup fep OUT: GREEN GREEN PURPLE
IN: lug tufa gazzer tufa gazzer OUT: YELLOW RED RED
IN: gazzer tufa gazzer OUT: RED RED
IN: lug fep fep wif OUT: YELLOW GREEN GREEN YELLOW GREEN GREEN
IN: gazzer fep lug OUT: RED GREEN YELLOW
IN: fep zup lug wif OUT: YELLOW YELLOW GREEN YELLOW YELLOW GREEN

*QUERY*
IN: lug tufa dax zup lug OUT: YELLOW YELLOW YELLOW PURPLE
IN: lug zup dax wif OUT: PURPLE PURPLE YELLOW PURPLE PURPLE YELLOW
IN: dax zup dax OUT: PURPLE PURPLE PURPLE
IN: fep lug gazzer zup dax OUT: GREEN YELLOW PURPLE PURPLE RED
IN: lug zup gazzer OUT: RED RED YELLOW
IN: gazzer zup gazzer OUT: RED RED RED
IN: lug OUT: YELLOW
IN: lug tufa gazzer zup lug OUT: YELLOW YELLOW YELLOW RED
IN: dax OUT: PURPLE
IN: fep OUT: GREEN

*GRAMMAR*
lug -> YELLOW 
 dax -> PURPLE 
 fep -> GREEN 
 gazzer -> RED 
 u1 tufa x1 -> [u1] [x1] 
 u1 zup u2 -> [u2] [u2] [u1] 
 x1 wif -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 