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

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

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