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

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

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