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

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

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