*SUPPORT*
IN: fep wif dax kiki dax fep OUT: YELLOW RED YELLOW GREEN
IN: wif OUT: GREEN
IN: kiki dax fep OUT: YELLOW RED
IN: wif tufa OUT: GREEN GREEN
IN: wif wif dax wif OUT: GREEN GREEN GREEN
IN: wif lug fep dax wif tufa OUT: GREEN GREEN YELLOW GREEN YELLOW
IN: kiki gazzer dax gazzer lug wif tufa tufa OUT: PINK RED PINK GREEN GREEN GREEN GREEN
IN: fep dax wif dax fep tufa dax fep OUT: YELLOW YELLOW GREEN YELLOW YELLOW GREEN YELLOW
IN: fep OUT: YELLOW
IN: kiki kiki OUT: RED RED
IN: fep fep kiki OUT: YELLOW YELLOW RED
IN: fep dax kiki OUT: RED YELLOW
IN: gazzer dax kiki lug fep dax gazzer OUT: RED PINK PINK YELLOW
IN: gazzer OUT: PINK

*QUERY*
IN: gazzer dax kiki dax wif tufa OUT: GREEN RED PINK GREEN RED PINK
IN: kiki tufa OUT: RED RED
IN: gazzer lug fep tufa tufa OUT: PINK YELLOW YELLOW YELLOW YELLOW
IN: kiki wif OUT: RED GREEN
IN: kiki kiki dax wif dax fep lug fep OUT: YELLOW GREEN RED RED YELLOW
IN: gazzer dax gazzer dax gazzer dax gazzer OUT: PINK PINK PINK PINK
IN: wif dax gazzer tufa OUT: PINK GREEN PINK GREEN
IN: kiki OUT: RED
IN: gazzer tufa OUT: PINK PINK
IN: kiki fep OUT: RED YELLOW

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