What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_14, if x_14 works, then x_14 is listening to a song. There is at least one x_14 for which x_14 will cook or x_14 will work. For all x_14, x_14 will write a letter. For all x_14, if x_14 cooks, then x_14 is listening to a song. For all x_14, x_14 will take a plane.
For all x_14, x_14 will write a letter and x_14 will take a plane. For all x_14, x_14 will take a plane and x_14 will write a letter. There is at least one x_14 for which x_14 will listen to a song.