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

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

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