The proper spelling of "failla" is /faɪlə/. The first sound is the "f" sound represented by the IPA symbol /f/. Then, there's the "ai" diphthong represented by /aɪ/. The third sound is the "l" sound represented by /l/. Lastly, there's the schwa sound represented by /ə/. All of these sounds put together form the correct spelling of "failla". It's important to spell words correctly to ensure effective communication, especially in written correspondence.