Thanks for the response, but you misunderstood my task. The 'a>', 'b>', 'c>' are not really present in the text file. I included them as "line numbers" to illustrate where I wanted the text split up. In the specific case I presented, the text is split up at the line *before* the line that starts with '======'.
In any case, I am curious about a general approach to such problems, and at first glance, it seems that a state machine approach would help me. However, I got stuck with that as well, especially since my splitting markers are not *in* the line where I want to split the text, but *after* the line on which I want to split.
when small people start casting long shadows, it is time to go to bed
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