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

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

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