import re

pattern = r"\d+\..*?(?=\d+\.|$)"
string="1.Adam-Lee-Dotnet-9191919191-AdamLee@gmail.com-London-UK-Oracle-Banking2.Peter-Smith-Salesforce-9222291910-PeterSmith21@gmail.com-Mumbai-INDIA-Oracle-Engineering3.Harrison-Lu-Java-9223391910-HarrisonLu@gmail.com-Mumbai-INDIA-Samsung-Engineering4.Andrew-Joseph-Javascript-9200091910-AndrewJoseph@gmail.com-Toronto-CANADA-Dell-Engineering5.Larry-Ken-SQL-8880091910-LarryKen@gmail.com-Newyork-USA-HP-Management"                    

res = re.findall(pattern, string)
print(res)