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

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

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