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

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

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