An image forming apparatus which reduces abrasion of a photosensitive drum caused by a rotary brush such as an charging brush for electrically charging the surface of a photosensitive drum or a cleaning brush for cleaning the surface of a photosensitive drum. In response, the computing device determines, based on a corpus that includes punctuated character strings previously entered by a user of the computing device, one or more punctuated versions of the character string. Each sub-region is separately simplified, and the localized transformations recorded in separate segments in a sequence of mesh refinement transformations that form the progressive mesh representation. Therefore, the sealing performance of the sealing portion does not deteriorate in dependence on the posture of the first connector when the first connector is fit in the second connector. Each light emitting element unit has an elongated illuminant surface along the longitudinal direction of the print circuit board due to the package thereof.