C#, 348 bytes

I had a go.

using System;class A{static void Main(){var a=new System.Collections.BitArray(Convert.FromBase64String("tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAIAAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));int c, d;for(var i=0;i<652;i++){if(a[i]){c=Math.DivRem(i,26,out d);Console.Write("{0}{1} ",(char)('A' + c),(char)('@' + d));}}}}

Ungolfed:

using System;

class A
{
    static void Main()
    {
        var a = new System.Collections.BitArray(Convert.FromBase64String(
            "tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAI" + 
            "AAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));
        int c, d; 
        for(var i = 0; i < 652; i++)
        {
            if(a[i])
            {
                c = Math.DivRem(i, 26, out d);
                Console.Write("{0}{1} ", (char)('A' + c), (char)('@' + d));
            }
        }
    }
}

C#, 348 bytes

I had a go:

using System;class A{static void Main(){var a=new System.Collections.BitArray(Convert.FromBase64String("tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAIAAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));int c, d;for(var i=0;i<652;i++){if(a[i]){c=Math.DivRem(i,26,out d);Console.Write("{0}{1} ",(char)('A' + c),(char)('@' + d));}}}}

Ungolfed:

using System;

class A
{
    static void Main()
    {
        var a = new System.Collections.BitArray(Convert.FromBase64String(
            "tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAI" + 
            "AAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));
        int c, d; 
        for(var i = 0; i < 652; i++)
        {
            if(a[i])
            {
                c = Math.DivRem(i, 26, out d);
                Console.Write("{0}{1} ", (char)('A' + c), (char)('@' + d));
            }
        }
    }
}

C# 348 Chars

I had a go,

using System;

class A
{
    static void Main()
    {
        var a = new System.Collections.BitArray(Convert.FromBase64String(
            "tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAI" + 
            "AAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));
        int c, d; 
        for(var i = 0; i < 652; i++)
        {
            if(a[i])
            {
                c = Math.DivRem(i, 26, out d);
                Console.Write("{0}{1} ", (char)('A' + c), (char)('@' + d));
            }
        }
    }
}

Consended:

using System;class A{static void Main(){var a=new System.Collections.BitArray(Convert.FromBase64String("tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAIAAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));int c, d;for(var i=0;i<652;i++){if(a[i]){c=Math.DivRem(i,26,out d);Console.Write("{0}{1} ",(char)('A' + c),(char)('@' + d));}}}}

C#, 348 bytes

I had a go.

using System;class A{static void Main(){var a=new System.Collections.BitArray(Convert.FromBase64String("tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAIAAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));int c, d;for(var i=0;i<652;i++){if(a[i]){c=Math.DivRem(i,26,out d);Console.Write("{0}{1} ",(char)('A' + c),(char)('@' + d));}}}}

Ungolfed:

using System;

class A
{
    static void Main()
    {
        var a = new System.Collections.BitArray(Convert.FromBase64String(
            "tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAI" + 
            "AAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));
        int c, d; 
        for(var i = 0; i < 652; i++)
        {
            if(a[i])
            {
                c = Math.DivRem(i, 26, out d);
                Console.Write("{0}{1} ", (char)('A' + c), (char)('@' + d));
            }
        }
    }
}

C#

I had a go, working here

using System;
public class A
{
    public static void Main()
    {
        var f = 0;
        char s = ' ';
 
        foreach(var c in "AABDEGHILMNRSTWXY,BAEIOY,DEO,EDFHLMNRSTX,FAE,GO,HAEIMO,IDFNST,JO,KAI,LAIO,MAEIMOUY,NAEOU,ODEFHIMNPRSWXY,PAEI,QI,RE,SHIO,TAIO,UHMNPST,WEO,XIU,YAEO,ZA")
        {
            if (f == 0)
            {
                Console.Write(c);
                s = c;
                f = 1;
            }
            else if (f == 1)
            {
                Console.Write(c);
                Console.Write(' ');
                f = 2;
            }
            else if (c == ',')
            {
                f = 0;
            }
            else
            {
                Console.Write(s);
                Console.Write(c);
                Console.Write(' ');
            }
        }
    }
}

The problem is, I don't this is better than the somewhat simpler,

public class A
 {
    public static void Main()
    {
        System.Console.Write("AA AB AD AE AG AH AI AL AM AN AR AS AT AW AX AY BA BE BI BO BY DE DO ED EF EH EL EM EN ER ES ET EX FA FE GO HA HE HI HM HO ID IF IN IS IT JO KA KI LA LI LO MA ME MI MM MO MU MY NA NE NO NU OD OE OF OH OI OM ON OP OR OS OW OX OY PA PE PI QI RE SH SI SO TA TI TO UH UM UN UP US UT WE WO XI XU YA YE YO ZA");
    }
 }

C# 348 Chars

I had a go,

using System;
 
class A
{
    static void Main()
    {
        var a = new System.Collections.BitArray(Convert.FromBase64String(
            "tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAI" +  
            "AAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));
        int c, d; 
        for(var i = 0; i < 652; i++)
        {
            if(a[i])
            {
                c = Math.DivRem(i, 26, out d);
                Console.Write("{0}{1} ", (char)('A' + c), (char)('@' + d));
            }
        }
    }
}

Consended:

using System;class A{static void Main(){var a=new System.Collections.BitArray(Convert.FromBase64String("tnOciwgCCAAAAAggAFBxHIkAAAAACICIKABQQBgAAAIgIACAgCAAIqIgigCCADfWuIgAAAACAIAAAAAwCICAIAAAYRkAAAAAAggAgAAIIoAACA=="));int c, d;for(var i=0;i<652;i++){if(a[i]){c=Math.DivRem(i,26,out d);Console.Write("{0}{1} ",(char)('A' + c),(char)('@' + d));}}}}