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

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

*GRAMMAR*
wif -> GREEN 
 fep -> BLUE 
 lug -> YELLOW 
 tufa -> RED 
 u1 kiki x1 -> [u1] [x1] [x1] [u1] 
 u1 dax x1 -> [u1] [x1] [u1] 
 x1 gazzer x2 -> [x1] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 