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

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

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