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

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

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