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

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

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