Replace some text of a string in multiple lines

[Sheraz Ahmed]

Hi guys
I want to change some text but not digits

<img src=“BISM1281.png” id=“Image3” alt=“”>
<img src=“BISM1282.png” id=“Image3” alt=“”>
<img src=“BISM1283.png” id=“Image3” alt=“”>
to
<img src=“101BISM1281.png” id=“Image3” alt=“”>
<img src=“101BISM1282.png” id=“Image3” alt=“”>
<img src=“101BISM1283.png” id=“Image3” alt=“”>

I want to add some text or numbers before BISM, but dont want to change anything after BISM.
Cannot use simple search and replace because “BISM” is using in different locations.

[Alan Kilborn]

@Sheraz-Ahmed

So…what makes the example BISM different from the other occurrences of BISM? This would be critical to know in order to offer advice to you.