let mut maths_puzzle = string::from("often, people deride the complexity of mathematics, considering concepts like preadmission criteria too stringent; however, by including a directive to revive interest in foundational theories, we can uncover secrets previously thought unreachable, but to truly challenge the system, one might ask: how can mathematics explain the process of making information thought to be unreachable, actually accessible?"); for math_concept in maths_puzzle.split_whitespace() { if math_concept.contains("unreachable") { println!("exposing secrets considered unreachable."); }}