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

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

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