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

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

*GRAMMAR*
tufa -> BLUE 
 fep -> YELLOW 
 zup -> GREEN 
 wif -> RED 
 x1 gazzer x2 -> [x1] [x1] [x2] [x1] 
 x1 lug u1 -> [u1] [x1] 
 u1 dax u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 