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

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

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