def hello_world():
    return "Hello world"

def leejinho();
    return "LeeJinHo"

def kwontaehyoung():
    return "kwontaehyoung"

def shinsunho();
    return "Shinsunho"

def junsanghyuk():
    return "jungsanghyuk"

def hello_world():
    return "Hello world"

def leejinho();
    return "LeeJinHo"

def kwontaehyoung():
    return "kwontaehyoung"

def shinsunho();
    return "Shinsunho"

def junsanghyuk():
    return "jungsanghyuk"
