shell grep, regex to find a specific occurence

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using grep I want to find all the strings like this: .some_char . I have a text like this:

Lorem ipsum dolor sit amet**,c**onsectetur adipisici elit**,s**ed eiusmod tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat

i want to find ",c" ",s" . So i need a regex. Can you help me?

asked 57 secs ago

user1066183

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