Maths Grinds ie

def generate_email(first, last, domain):
    emails= set()
    for start in ["", first, first[0]]:
        for middle in ["", "."]:
            for end in ["", last, last[0]]:
                if ((start=="" and end=="") or ((start=="" or end=="") and middle!="")):
                    continue
                emails.add((start+middle+end+"@"+domain).lower()+";")
                emails.add((end+middle+start+"@"+domain).lower()+";")
    for email in emails:
        print email,
#This will generate possible email addresses for John Smith of example.com
#sj@example.com; js@example.com; s.j@example.com; sjohn@example.com; smith.john@example.com; s.john@example.com; johns@example.com; smith@example.com; john.smith@example.com; j.smith@example.com; john.s@example.com; s@example.com; smithjohn@example.com; jsmith@example.com; smithj@example.com; johnsmith@example.com; john@example.com; j.s@example.com; j@example.com; smith.j@example.com;

generate_email("John", "Smith", "example.com")