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

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

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