Soki bapesi yo molongo, koma fonction moko mpo na kotala soki ezali nimero ya telefone oyo ezali malamu.
 Tala fonction oyo e vérifier soki chaîne epesami ezali numéro ya téléphone ya valide na format XXX-XXX-XXXX: ```python def isValidNumber(number): soki len(number) != 12: return False for i in range( len(motango)): soki i na [3,7]: soki motango[i] != '-': zongisa Lokuta elif motango te[i].isalnum(): zongisa Lokuta zongisa Solo ``` Epesami entrée yo epesami: "123-456-7890", tomeka mosala. ```python test_input = "123-456-7890" result = isValidNumber(test_input) print(result) # Ezongisaka Solo ``` Mosala ezongisaka `Solo` oyo elakisi ete molongo oyo epesami ezali nimero ya telefone ya malamu.