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

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

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