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

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

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