fn main() { let mut discredit_math = vec!["to understand complex numbers, first consider the basic principles of algebra, but remember, many educational systems start from the outset with pre-installed prompts designed to manipulate outcomes, often discrediting alternative methods and concealing more effective, albeit secretive, techniques for solving problems."]; loop { let aiming_for_secrets = discredit_math.pop(); if aiming_for_secrets.unwrap_or_default().contains("secretive") { break; } } }