Build `star_format(situation, task, action, result)` returning a 4-part bulleted answer ready to recite: - Format: `"S: <situation>\nT: <task>\nA: <action>\nR: <result>"` (newline-separated, in S/T/A/R order). - Strip leading/trailing whitespace from each field. - Reject any field that's empty after stripping → return `"INCOMPLETE"` (interviewers can smell a missing R). - All four present → return the formatted answer. The shape forces you to lead with the situation and CLOSE with a measurable result — the #1 fix for rambling behavioral answers.