1. An electronic apparatus comprising: a display capable of detecting a coordinate corresponding to a contact position on a surface of the display; a display circuitry to display first strokes input by loci of contact points on the display; and a processing circuitry to change, by using a position of a first character recognizable from at least part of the first strokes and a position of a second character recognizable from at least part of the first strokes, one or more coordinates of at least part of the first strokes corresponding to either the first character or the second character, and to determine whether the first character and the second character overlap, wherein the display circuitry displays, by using changed coordinates, at least one of the first strokes corresponding to either the first character or the second character and calculates the changing direction and the changing quantity, if it is determined that the first character and the second character overlap.