id	keyword
fumecheng-7767	aircraft
fumecheng-7767	fuzzy
fumecheng-7767	selection
fumecheng-7767	criteria
fumecheng-7767	regional
fumecheng-7767	aircraft selection
fumecheng-7767	airline
fumecheng-7767	piprecia
fumecheng-7767	study
fumecheng-7767	marcos
fumecheng-7767	method
fumecheng-7767	decision
fumecheng-7767	step
fumecheng-7767	matrix