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

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

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