 //???:?????? 
 //??:???
 //??:2010?11?17?
 //??:?????? 
int main()

{
	int a[6][3] = { { 0 , 1 , 2 } , { 0 , 2 , 1 } , { 1 , 2  , 0 } , { 1 , 0 , 2 } , { 2 , 0 , 1 } , { 2 , 1 , 0 } } , i , A , B , C ;        // ?????????
	for ( i = 0 ; i <= 5 ; i++ )
	{
		A = ( a[i][1] > a[i][0]) + ( a[i][2] == a[i][0] ) ;
	    B = ( a[i][0] > a[i][1]) + ( a[i][0] > a[i][2] ) ;
		C = ( a[i][2] > a[i][1]) + ( a[i][1] > a[i][0] ) ;
		if ( A + a[i][0] == 2 && B + a[i][1] == 2 && C + a[i][2] == 2 )                          // ????????????????????
			break;
	}
	if ( A > B && B > C )                                                                          // ?????????
		cout << "ABC" ;
	if ( A > C && C > B )
		cout << "ACB" ;
	if ( B > A && A > C )
		cout << "BAC" ;
	if ( B > C && C > A )
		cout << "BCA" ;
	if ( C > A && A > B )
		cout << "CAB" ;
	if ( C > B && B > A )
		cout << "CBA" ;
	return 0;
}