*SUPPORT*
IN: tufa fep lug zup blicket tufa OUT: RED YELLOW RED GREEN RED GREEN GREEN
IN: wif zup tufa wif blicket tufa OUT: PURPLE GREEN RED RED PURPLE RED PURPLE PURPLE
IN: zup dax OUT: GREEN GREEN
IN: tufa dax OUT: RED RED
IN: fep fep wif dax lug fep OUT: YELLOW YELLOW PURPLE PURPLE YELLOW
IN: zup zup dax OUT: GREEN GREEN GREEN
IN: fep dax OUT: YELLOW YELLOW
IN: wif fep blicket zup OUT: PURPLE GREEN YELLOW GREEN YELLOW YELLOW
IN: wif zup dax OUT: PURPLE GREEN GREEN
IN: wif tufa dax OUT: PURPLE RED RED
IN: zup zup blicket tufa OUT: GREEN RED GREEN RED GREEN GREEN
IN: wif blicket fep OUT: YELLOW PURPLE YELLOW PURPLE PURPLE
IN: zup OUT: GREEN
IN: zup lug wif dax OUT: GREEN PURPLE PURPLE

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

*GRAMMAR*
wif -> PURPLE 
 tufa -> RED 
 fep -> YELLOW 
 zup -> GREEN 
 x1 lug x2 -> [x1] [x2] 
 u1 blicket u2 -> [u2] [u1] [u2] [u1] [u1] 
 u1 dax -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 