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

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

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