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

*QUERY*
IN: tufa dax wif OUT: YELLOW BLUE YELLOW BLUE
IN: gazzer fep wif OUT: GREEN BLUE
IN: zup fep zup OUT: RED RED
IN: wif dax tufa OUT: BLUE YELLOW BLUE YELLOW
IN: zup fep tufa OUT: RED YELLOW
IN: wif dax wif OUT: BLUE BLUE BLUE BLUE
IN: gazzer OUT: GREEN
IN: zup dax zup OUT: RED RED RED RED
IN: gazzer dax zup OUT: GREEN RED GREEN RED
IN: wif dax zup OUT: BLUE RED BLUE RED

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