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

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

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