Posts must be at least 20 characters
Would a 
make your point?
Posts must be at least 20 characters
Could a do the job?
Posts must be at least 20 characters
That short, a could do.
Posts must be at least 20 characters
Brief thought? A instead!
Posts must be at least 20 characters
Short thought: use instead?
Posts must be at least 20 characters
Instead, consider a .