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

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

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