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

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

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