*SUPPORT*
IN: wif kiki zup OUT: PURPLE GREEN
IN: gazzer OUT: YELLOW
IN: gazzer blicket OUT: YELLOW YELLOW
IN: fep zup blicket OUT: BLUE PURPLE PURPLE
IN: fep zup kiki wif OUT: BLUE GREEN PURPLE
IN: wif gazzer kiki gazzer OUT: GREEN YELLOW YELLOW
IN: gazzer kiki zup OUT: PURPLE YELLOW
IN: wif fep blicket OUT: GREEN BLUE BLUE
IN: fep blicket OUT: BLUE BLUE
IN: zup kiki wif OUT: GREEN PURPLE
IN: zup OUT: PURPLE
IN: zup tufa wif OUT: PURPLE GREEN
IN: wif blicket OUT: GREEN GREEN
IN: fep tufa zup OUT: BLUE PURPLE

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

*GRAMMAR*
wif -> GREEN 
 zup -> PURPLE 
 fep -> BLUE 
 gazzer -> YELLOW 
 u1 blicket -> [u1] [u1] 
 u1 kiki u2 -> [u2] [u1] 
 u1 tufa u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 