AIX/Linux Shell Script for User Check

I need an AIX/Linux shell script that will help check the login status of users on a list of servers. The script should work as follows:

- The script will be provided with a list of servers and corresponding users. Each server will have one user to check.
- The script should only check the user on the specified server. It should not check in the current server for other users.
- The script will check if the user is locked. If not, the user should be locked by the script.
- The script should then check again if the user is locked and provide an output

The server-user list will look like this:
Server1 User1
Server2 User2
Server3 User3
...

Output Requirements:
- The output of the script should be a text file.
- The output should include: server name, user status, last login, and any error messages

Ideal Skills and Experience:
- Proficiency in AIX/Linux shell scripting
- Experience with system user checks
- Ability to manage and format output files
- Attention to detail to ensure accurate server-user checking

Please note, the server-user list will be manually inputted. The script should be able to handle a typical list of 200 servers and 200 users.