*SUPPORT*
IN: lug kiki lug OUT: GREEN GREEN
IN: wif kiki tufa OUT: RED PINK
IN: tufa OUT: RED
IN: tufa kiki fep dax lug OUT: GREEN YELLOW RED
IN: wif OUT: PINK
IN: fep OUT: YELLOW
IN: tufa tufa kiki tufa blicket lug OUT: RED RED RED GREEN
IN: fep kiki tufa OUT: RED YELLOW
IN: wif lug tufa kiki wif OUT: PINK GREEN PINK RED
IN: tufa wif kiki tufa dax wif OUT: PINK RED RED PINK
IN: lug kiki wif OUT: PINK GREEN
IN: lug blicket tufa OUT: GREEN RED
IN: tufa fep kiki tufa OUT: RED RED YELLOW
IN: fep dax wif fep kiki tufa OUT: PINK RED YELLOW YELLOW

*QUERY*
IN: wif kiki lug OUT: GREEN PINK
IN: tufa lug kiki wif OUT: RED PINK GREEN
IN: tufa kiki wif OUT: PINK RED
IN: fep blicket fep OUT: YELLOW YELLOW
IN: tufa wif blicket tufa OUT: RED PINK RED
IN: wif kiki fep OUT: YELLOW PINK
IN: wif kiki wif OUT: PINK PINK
IN: fep dax lug blicket lug OUT: GREEN GREEN YELLOW
IN: tufa kiki tufa OUT: RED RED
IN: fep fep kiki wif blicket tufa OUT: YELLOW PINK YELLOW RED

*GRAMMAR*
wif -> PINK 
 tufa -> RED 
 fep -> YELLOW 
 lug -> GREEN 
 u1 kiki u2 -> [u2] [u1] 
 x1 dax x2 -> [x2] [x1] 
 x1 blicket u1 -> [x1] [u1] 
 u1 x1 -> [u1] [x1] 
 