# 7-922-946-93-88
# 8-922-946-93-88
# +7 923 123 45 67
# 0-111-222-33-44


numbers = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]


def validate_phone(phone: str) -> bool:
    exit_str = ""
    if phone[0] == "+":
        return False
    for s in phone:
        if s in numbers:
            exit_str += s
    if exit_str[0] == "7" or exit_str[0] == "8":
        if len(exit_str) == 11:
            return True

    return False



print("89231234567", validate_phone("89231234567"))
print("8-923-123-45-67", validate_phone("8-923-123-45-67"))
print("+79211234567", validate_phone("+79211234567"))
print("123456", validate_phone("123456"))