*SUPPORT*
IN: wif zup fep tufa OUT: GREEN YELLOW YELLOW
IN: wif fep gazzer wif kiki dax tufa OUT: GREEN YELLOW BLUE GREEN RED RED
IN: wif tufa OUT: GREEN GREEN
IN: dax tufa OUT: RED RED
IN: dax zup fep tufa OUT: RED YELLOW YELLOW
IN: wif zup gazzer OUT: GREEN BLUE
IN: dax OUT: RED
IN: fep tufa OUT: YELLOW YELLOW
IN: gazzer OUT: BLUE
IN: dax zup fep wif gazzer tufa OUT: RED YELLOW GREEN BLUE BLUE
IN: fep kiki gazzer wif zup fep OUT: YELLOW BLUE GREEN YELLOW
IN: gazzer gazzer zup dax gazzer wif OUT: BLUE BLUE RED BLUE GREEN
IN: dax fep kiki fep wif gazzer kiki gazzer OUT: RED YELLOW YELLOW GREEN BLUE BLUE
IN: gazzer tufa OUT: BLUE BLUE

*QUERY*
IN: fep zup dax zup fep OUT: YELLOW RED YELLOW
IN: wif fep fep zup fep wif OUT: GREEN YELLOW YELLOW YELLOW GREEN
IN: wif dax fep zup wif kiki dax tufa OUT: GREEN RED YELLOW GREEN RED RED
IN: gazzer wif tufa OUT: BLUE GREEN GREEN
IN: wif fep tufa OUT: GREEN YELLOW YELLOW
IN: gazzer dax OUT: BLUE RED
IN: gazzer zup gazzer tufa OUT: BLUE BLUE BLUE
IN: fep OUT: YELLOW
IN: wif OUT: GREEN
IN: dax fep tufa OUT: RED YELLOW YELLOW

*GRAMMAR*
fep -> YELLOW 
 gazzer -> BLUE 
 dax -> RED 
 wif -> GREEN 
 u1 zup x1 -> [u1] [x1] 
 u1 kiki x1 -> [u1] [x1] 
 u1 tufa -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 