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

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

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