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

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

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