using System;
 
public class Test
{
    private static int convert(string s) {
        int res = 0;
        foreach (var c in s) {
            int d = c - 'A' + 1;
            res = 26 * res + d;
        }
        return res;
    }
	public static void Main()
	{
		var ss = new[] {
  "A", "B", "C", "Y", "Z", "AA", "AB", "AC", "AZ", "ZY", "ZZ", "AAA"  	
		};
        foreach (var s in ss) {
            Console.WriteLine("{0} - {1}", s, convert(s));
        }
	}
}

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