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Regular Expression
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\d+ \d+ obj(?:(?!\d+ \d+ obj)[\s\S])*?@mail[\s\S]*?endobj
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gs
Input 1
1
New
12 12 obj << Some content here >> endobj 12 13 obj << Some content here with a email address that contains @mail. >> endobj 11 12 obj << Some more content here >> endobj 124 126 obj << Some content here Another Line too >> endobj 12 16 obj << Some content here Another Line Another Line An @mail address. >> endobj
Substitution