//***************************************************
//*   ????1000012846_4.cpp  *********************
//*   ?????  ***********************************
//*   ?????2010?11?  *************************
//*   ????????  *****************************                          
//***************************************************
void judge(int A,int B,int C)         //??????ABC????????
{
	if ( A < B && B < C )
		cout << "ABC" << endl ;
	if ( A < C && C < B )
		cout << "ACB" << endl ;
	if ( B < A && A < C )
		cout << "BAC" << endl ;
	if ( B < C && C < A )
		cout << "BCA" << endl ;
	if ( C < A && A < B )
		cout << "CAB" << endl ;
	if ( C < B && B < A )
		cout << "CBA" << endl ;
}
int main()     //???
{
	int A,B,C;
	for ( A = 0 ; A < 3 ; A++ )            //?????????A,B,C
		for ( B = 0 ; B < 3 ; B++ )
			for ( C = 0 ; C < 3 ; C++ )
				if ( A + ( B > A ) + ( C == A ) == 2 && B + ( A > B ) + (A > C ) == 2 && C + ( C > B ) + ( B > A ) == 2 )
					judge(A,B,C);          //??????
	return 0;
}