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

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

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