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

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

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