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

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

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