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

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

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