Question: what are irregular vowel teams?
Answer: "igh" /aɪ/ as in high or sight.
"-ng" /ɪŋ/, /æŋ/, /ʌŋ/ as in sing, song, sung.
"ost" /oʊ/ as in most (but not "lost" or "cost")
"ow" /oʊ/, /aʊ/ has two different sounds as in low, and cow.
"ed" /ət/, /d/, /t/ has three different sounds as in lifted, played, and walked.