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simona1@sfusd.edu > seeLetter
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Given a string, if the string begins with a letter of the alphabet return return a string with that lettered doubled through the string, otherwise return the string unchanged.


seeLetter("attach") → "aattaach"
seeLetter("!attach") → "!attach"
seeLetter("a") → "aa"

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public String seeLetter(String str) { }

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