while 1:
    try:
        n = int(input())
        if n == 200:
            print("OK")
        elif n == 202:
            print("Accepted")
        elif n == 400:
            print("Bad Request")
        elif n == 403:
            print("Forbidden")
        elif n == 404:
            print("Not Found")
        elif n == 500:
            print("Internal Server Error")
        elif n == 502:
            print("Bad Gateway")
    except:
        break