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

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

*GRAMMAR*
zup -> GREEN 
 lug -> YELLOW 
 wif -> PINK 
 tufa -> RED 
 u1 dax u2 -> [u2] [u1] [u2] 
 x1 kiki -> [x1] [x1] 
 x1 fep x2 -> [x2] [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 