*SUPPORT*
IN: zup lug dax OUT: GREEN PINK
IN: wif gazzer fep OUT: YELLOW RED
IN: dax wif wif OUT: GREEN YELLOW YELLOW
IN: fep fep OUT: RED RED
IN: zup dax gazzer dax OUT: PINK GREEN GREEN
IN: wif gazzer dax OUT: YELLOW GREEN
IN: zup blicket zup OUT: PINK PINK
IN: wif zup lug wif OUT: YELLOW YELLOW PINK
IN: fep OUT: RED
IN: wif OUT: YELLOW
IN: wif zup lug fep OUT: YELLOW RED PINK
IN: fep lug dax OUT: GREEN RED
IN: zup lug zup OUT: PINK PINK
IN: fep blicket fep OUT: RED RED

*QUERY*
IN: dax blicket dax OUT: GREEN GREEN
IN: dax lug wif OUT: YELLOW GREEN
IN: wif gazzer zup OUT: YELLOW PINK
IN: fep lug zup OUT: PINK RED
IN: wif lug zup OUT: PINK YELLOW
IN: dax gazzer dax OUT: GREEN GREEN
IN: dax OUT: GREEN
IN: fep lug wif OUT: YELLOW RED
IN: dax gazzer fep OUT: GREEN RED
IN: wif blicket wif OUT: YELLOW YELLOW

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