<?php
$string = "18/05-01/06 01/06-06/07 06/07-22/08 22/08-14/09 DR Record + 2 21.47 20.24 27.15 20.24 BE Record + 2 24.05 22.68";
$parts = preg_split('/(?=[a-z])|(?<=[a-z])/i', $string, 3); // your code goes here
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