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Brain-Flak, 97 bytes (96 for code, 1 for flag) {}<>(())({<(<()>)<>({<({}[()])><>([{}]())<>}{})<>(<{}>())<>{({}[()])<>([{}])<>}{}<>({}{})>()}{}) Run with the -a flag. Try it online! Explanation: {} #skip the first open bracket and <>(()) #place a 1 on stack B, representing the nesting d...