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

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

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