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

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

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