//**********************
//********???********
//*??:?? 1100012915*
//******??:10.12******
//**********************
int main()
{
	int a,b,c,at,bt,ct,shunxu1,shunxu2;//a?b?c?A?B?C???
	for (a = 1 ; a <= 3 ; a ++)//????...
	{
		for (b = 1 ; b <= 3 ; b ++)
		{
			if (b != a)
			{
				for (c = 1 ; c <= 3 ; c++)
				{
					if (c != a && c != b)
					{
						at = (b > a)+(c == a);//at,bt,ct?A?B?C?????
						bt = (a > b)+(a > c);
						ct = (c > b)+(b > a);
						shunxu1 = a * 100 + b * 10 + c;//???????????????????????????
						shunxu2 = at *100 + bt * 10 + ct;
						if (shunxu1 + shunxu2 == 333)//???????????
							switch(shunxu1)//switch?if????...
						{
							case 123 :cout << "ABC";break;//123??A???1?B?2?C?3???????????ABC
							case 132 :cout << "ACB";break;
							case 213 :cout << "BAC";break;
							case 231 :cout << "CAB";break;
							case 312 :cout << "BCA";break;
							default :cout << "CBA";
							}
					}
				}
			}
		}
	}
	return 0;
}