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

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

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