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

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

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