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

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

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