Replacing a specific char

[gertsg]

Could you please let me know how can I replace the last character of any word in my tags, without replacing the similar characters inside the word?
For example, change the word ababa to ababc.
Thanks in advance

[ohrenkino]

Create an action of the type "Replace with regular expression"
Type in as search string: a$
Type in as replace string: c

[gertsg]

Create an action of the type "Replace with regular expression"
Type in as search string: a$
Type in as replace string: c

Thanks a lot. Very kind of you.
What if there are more than one word?
Example : ababa cdcda efefa.... to ababc cdcdc efefc

[ohrenkino]

Thanks a lot. Very kind of you.
What if there are more than one word?
Example : ababa cdcda efefa.... to ababc cdcdc efefc

a second action would be necessary
search a\s
replace with c

I cannot think of any string where that would make sense.

[gertsg]

a second action would be necessary
search a\s
replace with c

I cannot think of any string where that would make sense.

Great !!! It works. Thanks