1968-1969

Since the original text "Duty Post" is already quite straightforward and doesn't seem to contain any OCR errors or formatting issues that need correction according to the given rules, the output will remain largely the same. However, to adhere strictly to the output format requested, which is HTML using `

` for paragraphs, the text should be formatted as follows:

Duty Post

This maintains the original content while conforming to the specified output format.