def findEmailDomain(address):
    for i in range(0, len(address)):
        if address[-i] == '@':
            return address[-i + 1:]

129b46e34a9e79980a463ef48b3b219b127abf3d
<mask token>

def findEmailDomain(address):
    for i in range(0, len(address)):
        if address[-i] == '@':
            return address[-i + 1:]
