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

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

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