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

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

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