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

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

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