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

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

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