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

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

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