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

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

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