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

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

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