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

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

*GRAMMAR*
gazzer -> RED 
 lug -> YELLOW 
 fep -> BLUE 
 wif -> GREEN 
 u1 tufa u2 -> [u2] [u1] [u2] [u1] [u2] 
 u1 dax x1 -> [x1] [x1] [u1] 
 x1 blicket x2 -> [x2] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 