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

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

*GRAMMAR*
wif -> RED 
 tufa -> PURPLE 
 lug -> GREEN 
 gazzer -> YELLOW 
 u1 zup u2 -> [u2] [u1] 
 x1 dax x2 -> [x2] [x1] 
 x1 fep -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 