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

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

*GRAMMAR*
dax -> GREEN 
 lug -> YELLOW 
 tufa -> PINK 
 gazzer -> RED 
 u1 fep u2 -> [u2] [u1] 
 x1 wif x2 -> [x2] [x1] 
 x1 zup -> [x1] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 