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

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

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