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

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

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