Return the first and last character of a string, concatenated together. If there is only one character in the string, the function should give that character back twice since it is both the first and last character of the string.
Example:
stringfirstandlast('boring example') = 'be'
that is it
812 Solvers
310 Solvers
185 Solvers
Make a random, non-repeating vector.
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362 Solvers