using System;
using System.Collections.Generic;
using System.Linq;
 
public class Program {
	public static void Main() {
		var lista = new List<string> { "AAA", "BBB", "CCC", "ABB", "ABC", "ACC", "ACD" };
		Semelhante(lista, "A");
		Semelhante(lista, "B");
		Semelhante(lista, "C");
		Semelhante(lista, "AB");
		Semelhante(lista, "AC");
	}
	public static void Semelhante(List<string> lista, string padrao) {
		foreach (var item in lista.OrderByDescending(x => (x.Contains(padrao)))) {
			Console.WriteLine(item);
		}
		Console.WriteLine();
	}
}
 
//https://pt.stackoverflow.com/q/259493/101

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