It could be said that this is similar to the HIJACK THREAD, but the difference is that the *LAST* word in your sentence is the *FIRST* word in the next post.
As an example, I'll pretend that I've made three posts here. The last word in my third sentence will be the first word in the post after mine.
It IS permissible to start your sentence with an article (A, AN, THE), with the start word being the word after the article. The first post could actually be a reply to a sentence which ended with CHECK.
[The] check is in the mail.
Mail can really stack up when you're out of town for a week.
Week after week, month after month, the political machinery will gradually work its way toward a final resolution in early November.