*SUPPORT*
IN: blicket kiki OUT: PINK PINK
IN: dax dax tufa dax OUT: YELLOW YELLOW YELLOW
IN: fep tufa fep OUT: GREEN GREEN
IN: dax OUT: YELLOW
IN: dax wif tufa dax OUT: YELLOW YELLOW BLUE
IN: wif tufa dax OUT: YELLOW BLUE
IN: wif kiki OUT: BLUE BLUE
IN: fep wif OUT: GREEN BLUE
IN: blicket tufa fep OUT: GREEN PINK
IN: blicket tufa dax OUT: YELLOW PINK
IN: dax kiki OUT: YELLOW YELLOW
IN: dax gazzer OUT: YELLOW YELLOW
IN: dax tufa blicket OUT: PINK YELLOW
IN: fep kiki OUT: GREEN GREEN

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

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