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

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

*GRAMMAR*
wif -> GREEN 
 zup -> YELLOW 
 fep -> RED 
 kiki -> PURPLE 
 u1 lug -> [u1] [u1] 
 u1 dax u2 -> [u1] [u2] 
 x1 tufa x2 -> [x2] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 