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

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

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