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

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

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