public static void Main()
string word = "my name is victor";
var _wordArray = word.Split(' ');
for(int i = 0; i <= _wordArray.Length - 1; i++)
for(int j = 0; j <= _wordArray[i].Length - 1; j++)
if (j == 0 || j == (_wordArray[i].Length - 1))
_output += _wordArray[i][j].ToString().ToUpper();
_output += _wordArray[i][j];
Console.WriteLine(_output);