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

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

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