The spelling of the English phrase "puts coats" follows the standard phonetic rules of the language. "Puts" is spelled with the voiced consonant /z/ sound, represented in IPA as /pʊts/. "Coats" is spelled with the voiceless /s/ sound, represented as /kəʊts/. The voiced and voiceless distinction in consonants is an important feature of English pronunciation and can change the meaning of words (e.g. "bake" vs "fake"). In "puts coats," the combination of these sounds creates a smooth and natural flow of speech.