First, he lost his job.
Given: A former policeman lost his house, his car and his girlfriend.
The question asked is an interesting riddle. Implications are given.
In the question, he was told he was a former policeman. This means that he has already lost his job.
"X" is used to indicate that no one is in this situation. Here, a former policeman means that he no longer works as a policeman.
First, he lost his job, then he lost his house, his car and finally he lost his girlfriend.
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