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

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

*GRAMMAR*
blicket -> YELLOW 
 tufa -> RED 
 fep -> GREEN 
 lug -> BLUE 
 x1 dax x2 -> [x1] [x2] 
 x1 wif -> [x1] [x1] 
 u1 zup x1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 