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

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

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