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

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

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