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

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

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