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

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

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