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

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

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