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interchanging▼[UK: ˌɪn.tə.ˈtʃeɪndʒ.ɪŋ] [US: ˌɪn.tə.ˈtʃeɪndʒ.ɪŋ]
permuting▼[UK: pə.ˈmjuːt.ɪŋ] [US: pə.ˈmjuːt.ɪŋ]
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