*SUPPORT*
IN: dax tufa fep OUT: RED GREEN
IN: dax fep kiki OUT: GREEN RED RED RED
IN: wif wif fep fep dax OUT: BLUE BLUE RED RED GREEN
IN: dax kiki tufa lug OUT: PURPLE GREEN GREEN GREEN
IN: fep blicket OUT: RED RED RED RED
IN: fep tufa lug OUT: PURPLE RED
IN: dax blicket OUT: GREEN GREEN GREEN GREEN
IN: fep fep fep blicket OUT: RED RED RED RED RED RED
IN: dax kiki OUT: GREEN GREEN GREEN
IN: fep kiki tufa wif OUT: BLUE RED RED RED
IN: wif tufa wif OUT: BLUE BLUE
IN: lug wif kiki tufa dax tufa fep OUT: RED GREEN PURPLE BLUE BLUE BLUE
IN: lug lug tufa dax OUT: GREEN PURPLE PURPLE
IN: lug blicket tufa fep tufa dax OUT: GREEN RED PURPLE PURPLE PURPLE PURPLE

*QUERY*
IN: dax OUT: GREEN
IN: lug kiki OUT: PURPLE PURPLE PURPLE
IN: wif lug blicket OUT: BLUE PURPLE PURPLE PURPLE PURPLE
IN: dax wif kiki tufa wif tufa wif OUT: BLUE BLUE GREEN BLUE BLUE BLUE
IN: dax dax dax fep kiki OUT: GREEN GREEN GREEN RED RED RED
IN: wif kiki OUT: BLUE BLUE BLUE
IN: fep kiki OUT: RED RED RED
IN: lug kiki tufa lug OUT: PURPLE PURPLE PURPLE PURPLE
IN: wif OUT: BLUE
IN: lug blicket OUT: PURPLE PURPLE PURPLE PURPLE

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