*SUPPORT*
IN: wif gazzer zup OUT: RED RED BLUE
IN: lug gazzer fep OUT: PINK PINK GREEN
IN: wif OUT: RED
IN: lug fep OUT: PINK GREEN
IN: zup kiki lug OUT: BLUE PINK PINK
IN: zup kiki zup OUT: BLUE BLUE BLUE
IN: wif fep gazzer zup OUT: RED GREEN GREEN BLUE
IN: wif lug kiki lug OUT: RED PINK PINK PINK
IN: wif tufa zup OUT: BLUE RED
IN: wif kiki lug OUT: RED PINK PINK
IN: fep wif lug kiki fep OUT: GREEN RED PINK GREEN GREEN
IN: wif fep tufa lug OUT: RED PINK GREEN
IN: lug OUT: PINK
IN: lug gazzer lug OUT: PINK PINK PINK

*QUERY*
IN: wif tufa wif OUT: RED RED
IN: zup lug kiki fep OUT: BLUE PINK GREEN GREEN
IN: lug tufa fep OUT: GREEN PINK
IN: lug tufa zup OUT: BLUE PINK
IN: lug tufa lug OUT: PINK PINK
IN: zup OUT: BLUE
IN: zup gazzer wif OUT: BLUE BLUE RED
IN: lug kiki lug OUT: PINK PINK PINK
IN: wif kiki wif OUT: RED RED RED
IN: zup gazzer lug OUT: BLUE BLUE PINK

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