<p>Comma quibbling is a task originally set by Eric Lippert in his <ahref="http://blogs.msdn.com/b/ericlippert/archive/2009/04/15/comma-quibbling.aspx"title="link: http://blogs.msdn.com/b/ericlippert/archive/2009/04/15/comma-quibbling.aspx">blog</a>.</p>
Task:<p>Write a function to generate a string output which is the concatenation of input words from a list/sequence where:</p>
An input of no words produces the output string of just the two brace characters "{}".
An input of just one word, e.g. ["ABC"], produces the output string of the word inside the two braces, e.g. "{ABC}".
An input of two words, e.g. ["ABC", "DEF"], produces the output string of the two words inside the two braces with the words separated by the string " and ", e.g. "{ABC and DEF}".
An input of three or more words, e.g. ["ABC", "DEF", "G", "H"], produces the output string of all but the last word separated by ", " with the last word separated by " and " and all within braces; e.g. "{ABC, DEF, G and H}".
<p>Test your function with the following series of inputs showing your output here on this page:</p>
[] # (No input words).
["ABC"]
["ABC", "DEF"]
["ABC", "DEF", "G", "H"]
<p>Note: Assume words are non-empty strings of uppercase characters for this task.</p>