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

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

*GRAMMAR*
dax -> RED 
 wif -> GREEN 
 fep -> YELLOW 
 zup -> BLUE 
 u1 kiki x1 -> [x1] [u1] [x1] 
 x1 tufa u1 -> [x1] [u1] 
 x1 lug x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 