*SUPPORT*
IN: wif OUT: BLUE
IN: zup dax wif OUT: GREEN BLUE
IN: wif dax fep OUT: BLUE PURPLE
IN: wif fep blicket OUT: BLUE PURPLE PURPLE
IN: zup blicket OUT: GREEN GREEN
IN: wif tufa wif dax fep OUT: BLUE YELLOW BLUE PURPLE
IN: fep OUT: PURPLE
IN: fep dax tufa OUT: PURPLE YELLOW
IN: wif dax tufa OUT: BLUE YELLOW
IN: tufa blicket OUT: YELLOW YELLOW
IN: zup lug zup dax tufa OUT: GREEN GREEN YELLOW
IN: wif blicket OUT: BLUE BLUE
IN: fep dax wif OUT: PURPLE BLUE
IN: wif lug tufa blicket OUT: BLUE YELLOW YELLOW

*QUERY*
IN: zup OUT: GREEN
IN: fep dax tufa lug wif fep blicket OUT: PURPLE YELLOW BLUE PURPLE PURPLE
IN: tufa dax tufa OUT: YELLOW YELLOW
IN: wif zup wif dax zup OUT: BLUE GREEN BLUE GREEN
IN: tufa dax wif lug zup dax wif OUT: YELLOW BLUE GREEN BLUE
IN: wif fep lug tufa wif wif dax tufa OUT: BLUE PURPLE YELLOW BLUE BLUE YELLOW
IN: tufa OUT: YELLOW
IN: wif blicket lug wif blicket OUT: BLUE BLUE BLUE BLUE
IN: fep blicket OUT: PURPLE PURPLE
IN: zup dax zup OUT: GREEN GREEN

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