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

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

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