*SUPPORT*
IN: zup tufa dax OUT: GREEN PINK
IN: wif OUT: BLUE
IN: dax zup kiki zup OUT: PINK GREEN GREEN
IN: dax dax kiki zup OUT: PINK PINK GREEN
IN: zup zup OUT: GREEN GREEN
IN: fep OUT: RED
IN: zup kiki zup OUT: GREEN GREEN
IN: zup zup dax OUT: GREEN GREEN PINK
IN: fep kiki dax OUT: RED PINK
IN: dax tufa fep dax kiki dax OUT: PINK RED PINK PINK
IN: fep gazzer dax OUT: RED PINK
IN: zup OUT: GREEN
IN: zup tufa fep gazzer fep OUT: GREEN RED RED
IN: fep kiki zup gazzer fep gazzer fep OUT: RED GREEN RED RED

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

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