*SUPPORT*
IN: zup tufa dax OUT: GREEN PINK PINK
IN: dax lug wif kiki OUT: GREEN RED BLUE BLUE
IN: zup zup tufa lug OUT: PINK RED PINK PINK
IN: lug OUT: RED
IN: zup OUT: PINK
IN: wif blicket wif OUT: BLUE BLUE
IN: lug kiki OUT: RED RED
IN: wif blicket zup OUT: BLUE PINK
IN: wif OUT: BLUE
IN: wif kiki OUT: BLUE BLUE
IN: wif wif OUT: BLUE BLUE
IN: dax tufa zup OUT: PINK GREEN GREEN
IN: lug tufa zup OUT: PINK RED RED
IN: zup kiki OUT: PINK PINK

*QUERY*
IN: dax tufa lug OUT: RED GREEN GREEN
IN: lug tufa lug OUT: RED RED RED
IN: wif blicket lug OUT: BLUE RED
IN: wif tufa wif OUT: BLUE BLUE BLUE
IN: lug blicket wif OUT: RED BLUE
IN: zup blicket lug OUT: PINK RED
IN: lug lug kiki OUT: RED RED RED
IN: dax tufa wif OUT: BLUE GREEN GREEN
IN: lug zup tufa zup OUT: RED PINK PINK PINK
IN: wif tufa lug OUT: RED BLUE BLUE

*GRAMMAR*
lug -> RED 
 dax -> GREEN 
 wif -> BLUE 
 zup -> PINK 
 u1 blicket u2 -> [u1] [u2] 
 u1 tufa u2 -> [u2] [u1] [u1] 
 u1 kiki -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 