Real-Time Editing: Seamlessly replace text as you type, regardless of the application or platform you're using. No need to pause or switch between programs – String Replacer works wherever you do.

Implement the function to modify and return the string ‘ str’ in such a way that all occurrences of ‘ch1’ in original string are replaced by ‘ch2’ and all occurrences of ‘ch2’ in original string are ...