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

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

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