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

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

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