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

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

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