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Update README_EN.md

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Original file line number	Diff line number	Diff line change
`@@ -112,7 +112,7 @@ Based on the above rules, we can use a regular expression to match valid serial`
`112`	`112`	`# Write your MySQL query statement below`
`113`	`113`	`SELECT product_id, product_name, description`
`114`	`114`	`FROM products`
`115`		`-WHERE description REGEXP '\\bSN[0-9]{4}-[0-9]{4}\\b'`
	`115`	`+WHERE description REGEXP '(?-i)\\bSN[0-9]{4}-[0-9]{4}\\b'`
`116`	`116`	`ORDER BY 1;`
`117`	`117`	```
`118`	`118`
`@@ -123,7 +123,7 @@ import pandas as pd`
`123`	`123`
`124`	`124`
`125`	`125`	`def find_valid_serial_products(products: pd.DataFrame) -> pd.DataFrame:`
`126`		`- valid_pattern = r"\bSN[0-9]{4}-[0-9]{4}\b"`
	`126`	`+ valid_pattern = r"(?-i)\bSN[0-9]{4}-[0-9]{4}\b"`
`127`	`127`	`valid_products = products[`
`128`	`128`	`products["description"].str.contains(valid_pattern, regex=True)`
`129`	`129`	`]`

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