InterviewDigestTechnical2026-08-16
Find count of substrings with all 5 vowels
AI-Expanded — inferred from the question title, not from the original candidate report
Given a string consisting of lowercase English letters, count the number of substrings that contain all five vowels ('a', 'e', 'i', 'o', 'u') at least once. Each vowel must be present in the substring, though they do not need to appear in any specific order or frequency.
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