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

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

*GRAMMAR*
wif -> YELLOW 
 lug -> PINK 
 fep -> RED 
 dax -> GREEN 
 x1 gazzer x2 -> [x2] [x1] 
 x1 kiki -> [x1] [x1] 
 u1 tufa u2 -> [u2] [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 