Regular Expression Engine query results

Keyword "hello", note that there are spaces in the middle.

Material, "Hello, sir. Your watch looks beautiful. Hello, la ".

For the first time, find "hello" and remove it.

Remaining materials, "sir ,. Your watch looks beautiful. Hello, you are ".

The second time, find "Hello XXX", find the first satisfied, and then return.

That is, "Your watch is good", "You are good ".

 

Keyword "hello ",

Material: "Are you good? Are you good at your watch ".

For the first time, find "how are you" and remove it.

The rest of the materials are: ", are you sure you want to? Are you sure you want to read your watch ",

The second time, find "hello", find the first satisfaction, and remove it.

The rest of the materials are: "Are you sure you are good? Are you sure your watch is good ".

The third time, find "hello", find the first satisfaction, and remove it.

The rest of the materials, ", really, long-winded, is your watch good"

The fourth time, find "hello"

Is "your watch is good, right"