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

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

*GRAMMAR*
gazzer -> RED 
 fep -> BLUE 
 lug -> GREEN 
 kiki -> YELLOW 
 x1 tufa x2 -> [x2] [x1] 
 x1 wif u1 -> [u1] [x1] [u1] 
 u1 zup u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 