[USER (data scientist)]: We want to find clients who are employed and preferably have stable employment among the clients we filtered in the first step. We can consider stable employment as those with employment durations of 4 years or more. Please provide the result type as a list of client IDs with stable employment. Specifically, you can generate a list to visualize the client IDs with stable employment (4 years or more) from the 'credit_customers' dataframe.
My template of code snippet is:

---BEGIN CODE TEMPLATE---

import pandas as pd  
import pickle 
  
# Load the dataset  
credit_customers = pd.read_csv("credit_customers.csv")

# YOUR SOLUTION BEGIN:
<code1>
[COMPLETE YOUR CODE]
</code1>
# YOUR SOLUTION END

print(result_list)

# save data
pickle.dump(result_list,open("./pred_result/result_list_4.pkl","wb"))

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure, I can help you with that.
'''
import pandas as pd  
import pickle 
  
# Load the dataset  
credit_customers = pd.read_csv("credit_customers.csv")

# YOUR SOLUTION BEGIN:
