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

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

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