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

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

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