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

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

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