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

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

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