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

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

*GRAMMAR*
zup -> YELLOW 
 lug -> RED 
 dax -> PINK 
 gazzer -> GREEN 
 u1 wif x1 -> [u1] [x1] 
 u1 kiki -> [u1] [u1] 
 u1 tufa u2 -> [u2] [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 