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

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

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