*SUPPORT*
IN: tufa dax OUT: GREEN BLUE
IN: dax wif kiki wif zup OUT: RED RED BLUE RED
IN: wif fep OUT: RED YELLOW
IN: fep tufa OUT: YELLOW GREEN
IN: fep zup OUT: YELLOW YELLOW
IN: dax lug fep zup OUT: YELLOW BLUE YELLOW BLUE
IN: wif kiki fep OUT: YELLOW RED
IN: wif wif OUT: RED RED
IN: wif zup OUT: RED RED
IN: fep lug wif OUT: RED YELLOW
IN: wif OUT: RED
IN: wif kiki wif OUT: RED RED
IN: tufa OUT: GREEN
IN: fep kiki wif zup OUT: RED RED YELLOW

*QUERY*
IN: wif tufa OUT: RED GREEN
IN: dax OUT: BLUE
IN: fep OUT: YELLOW
IN: tufa fep zup kiki wif OUT: RED GREEN YELLOW GREEN YELLOW
IN: dax lug dax kiki fep lug dax OUT: BLUE YELLOW BLUE BLUE
IN: fep fep kiki tufa dax fep zup OUT: GREEN BLUE YELLOW GREEN BLUE YELLOW YELLOW YELLOW
IN: dax zup OUT: BLUE BLUE
IN: wif fep kiki wif dax dax zup OUT: RED BLUE BLUE RED BLUE BLUE RED YELLOW
IN: fep fep zup lug fep OUT: YELLOW YELLOW YELLOW YELLOW YELLOW
IN: wif zup lug tufa OUT: GREEN RED RED

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