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

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

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