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

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

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