Reverse characters of each words in vector string

vector <string> theWords;
theWords.reserve(100);

istream_iterator <string> stringReader(cin);
istream_iterator <string> stringReaderEOF;

while(stringReader != stringReaderEOF)
    theWords.push_back(* stringReader++);

display(theWords);
//reverse(theWords);

INPUT:

samin khan

OUTPUT:

samin

khan

After reversing:

nimas

nahk

How do I reverse the characters?