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

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

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