class Developer:
    def __init__(self):
        self.name = "kkm-horikawa"
        self.birth_year = 1994
        self.role = "Software Engineer"
        self.skills = [
            "Python",
            "Django",
            "JavaScript",
            "HTML",
            "CSS",
            "Bootstrap",
            "AWS",
            "Terraform",
            "Flutter",
        ]
        self.tools = [
            "VS Code",
            "Postman",
            "Git",
            "GitHub",
            "GitLab",
            "Redmine",
            "Slack",
            "DBeaver",
            "A5m2",
            "Tera Term",
            "Eclipse",
            "ffftp",
            "WinSCP",
            "WSL",
        ]
        self.os = ["Windows", "Ubuntu", "CentOS", "Zorin OS", "Linux Mint"]

    def __str__(self):
        return f"こんにちは、{self.name}です。"


developer = Developer()
print(developer)