#key非int类型

def http_status(status_code):
    http_statu={'200':'OK','202':'Accepted','400':'Bad Request','403':'Forbidden','404':'Not Found','500':'Internal Server Error','502':'Bad Gateway'}
    return http_statu.get(status_code)
while True:
    try:
        status_code=input()
        print(http_status(status_code))
    except:
        break