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

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

*GRAMMAR*
fep -> GREEN 
 lug -> RED 
 zup -> PINK 
 wif -> BLUE 
 u1 blicket u2 -> [u2] [u1] 
 u1 tufa x1 -> [u1] [x1] 
 u1 dax -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 