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

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

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