找出欠费患者

def solve():
    from pyodide.http import open_url
    patients_csv = open_url(____).read()
    departments_csv = open_url(____).read()
    doctors_csv = open_url(____).read()
    appointments_csv = open_url(____).read()
    diagnoses_csv = open_url(____).read()
    prescriptions_csv = open_url(____).read()
    bills_csv = open_url(____).read()
    import sqlite3
    import pandas as pd
    from io import StringIO

    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    pd.read_csv(StringIO(____)).to_sql(____)

    result = pd.read_sql_query(____)
    print(result.to_string(____))
    conn.close()