1D input.rb /^class D$/;" c 2_a? input.rb /^ def self._a?$/;" S class:D 3_b! input.rb /^ def self._b!$/;" S class:D 4_c= input.rb /^ def self._c=(a)$/;" S class:D 5x? input.rb /^ def self.x?$/;" S class:D 6y! input.rb /^ def self.y!$/;" S class:D 7z= input.rb /^ def self.z=(a)$/;" S class:D 8