import re
n = 3
password_data =[]
pattern =r"(U$)(?P<username>[A-Z][a-z]{2,})\1(P@$)(?P<password>[a-zA-Z]{5,}\d+)\3"
for _ in range(n):
    data = input()

    matches =re.finditer(pattern,data)
    for match in matches:
        result = match.groupdict()
        password_data.append(result)

if len(password_data) != 0:
    print("Registration was successful")
else:
    print("Invalid username or password")
for value in password_data:
    print(f"Username: {value['username']}, Password: {value['password']}")
print(f"Successful registrations: {len(password_data)}")