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

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

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