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

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

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