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

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

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