Remove grammatical mistakes: The upgrading process might cause inconveniences to the residents but is a pay off that they have to bear with for a better tomorrow.
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The first time I saw, I thought I had seen, but I was wrong.
The second time I saw the first time I saw the second time I thought I had seen the first time.
The third time I saw the first time I saw the second time I thought I had seen the second time.
The fourth time I saw the first time I saw the second time I thought I had seen the second time I saw the third time I thought I had seen the second time