The theory is that across cultures and linguistic groups there are five sounds, each with a meaning, that are used by infants before the language acquisition period.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: The theory is that across cultures and linguistic groups there are five sounds, each with a meaning, that are used by infants before the language acquisition period. ### Response: .