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

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

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