*SUPPORT*
IN: wif dax kiki dax lug wif OUT: RED GREEN GREEN RED
IN: wif gazzer tufa fep kiki tufa lug dax OUT: BLUE BLUE PURPLE GREEN RED
IN: wif kiki dax OUT: GREEN RED
IN: fep OUT: PURPLE
IN: wif tufa OUT: RED BLUE
IN: dax gazzer dax gazzer wif lug dax OUT: RED GREEN GREEN GREEN
IN: wif gazzer wif lug tufa OUT: RED BLUE RED
IN: dax tufa kiki fep OUT: GREEN PURPLE BLUE
IN: tufa gazzer fep wif kiki dax lug tufa OUT: PURPLE GREEN RED BLUE BLUE
IN: wif gazzer dax tufa lug dax OUT: GREEN BLUE GREEN RED
IN: wif OUT: RED
IN: wif kiki wif OUT: RED RED
IN: tufa wif OUT: BLUE RED
IN: wif gazzer dax tufa fep kiki dax OUT: GREEN BLUE GREEN PURPLE RED

*QUERY*
IN: fep kiki fep OUT: PURPLE PURPLE
IN: fep gazzer wif gazzer tufa fep kiki tufa OUT: BLUE BLUE PURPLE RED PURPLE
IN: dax OUT: GREEN
IN: dax kiki tufa OUT: BLUE GREEN
IN: fep kiki tufa OUT: BLUE PURPLE
IN: tufa lug dax OUT: BLUE GREEN
IN: fep kiki wif OUT: RED PURPLE
IN: wif gazzer fep dax kiki tufa lug fep OUT: PURPLE BLUE GREEN PURPLE RED
IN: fep dax OUT: PURPLE GREEN
IN: dax wif kiki tufa OUT: GREEN BLUE RED

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