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

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

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