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

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

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