String text = "aaaa aa aaaaa aaa a aaaaaaaaa aaaaaaaaaa aao";
char searchFor = 'a';
var sorted = text
.Split(new char[] {'.', '?', '!', ' ', ';', ':', ','}, StringSplitOptions.RemoveEmptyEntries)
.ToList()
.OrderBy(s => s.ToCharArray().Count(c => c == searchFor))
.ToList();
sorted.ForEach(s => Console.WriteLine(s));
Integer i = 42;
String s = Integer.toBinaryString(i);
interface GeometricalFigures {
void setSize(int... args);
}