drupal to wordpress- complete, but urls broken

greetings- i just converted from drupal to wordpress.

however, my old url’s are like this:

https://www.mysite.com/story/this_is_the_title

(notice the underscores)

i see how to include underscores, but how can i “rebuild” my newly imported posts so their permalinks are the same, or re-direct?

thank you