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

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

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