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

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

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