12. The method of claim 11 wherein the constituent stroke comprises a horizontal stroke, a vertical stroke, a left-falling stroke, a right-falling stroke or a turning stroke.
12. The method of claim 11 wherein the constituent stroke comprises a horizontal stroke, a vertical stroke, a left-falling stroke, a right-falling stroke or a turning stroke. 13. The method of claim 12 wherein the generating the one or more input keys comprises generating one or more stroke keys based on the one or more sets of Latin characters.