I put "words" in quotes because often time the "grammar marker" is actually part of the word. For instance, in "食べる", I do not actually mean to say that "食" is

I put "words" in quotes because often time the "grammar marker" is actually part of the word. For instance, in "食べる", I do not actually mean to say that "食" is a word. Rather, that you can look at something like "食べる林檎" and, using just orthography, find the word boundary "食べる　林檎". I threw katakana in there just because a word written using katakana instead of kanji does not actually present a problem for this. Words written in hiragana, however, do present a problem for this naive approach of finding word boundaries, but do not pose a problem unless you have a long string of them.