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

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

*GRAMMAR*
fep -> PURPLE 
 tufa -> YELLOW 
 wif -> GREEN 
 dax -> RED 
 u1 gazzer x1 -> [x1] [u1] 
 u1 zup -> [u1] [u1] 
 x1 lug x2 -> [x1] [x2] [x2] 
 u1 x1 -> [u1] [x1] 
 