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

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

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