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

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

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