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

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

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