import requests

def upload(data):
    url = 'https://paste2.org/'

    response = requests.post(url, data={'data': data})
    response.raise_for_status()

    # Extract the URL of the uploaded paste from the response
    paste_url = None
    for line in response.text.splitlines():
        if line.startswith('<input type="text" id="paste-url" value="'):
            paste_url = line.split('"')[3]
            break

    if paste_url is None:
        raise ValueError('Could not extract paste URL from response')

    return paste_url