int main()
{
  int af,bf,cf;
  int ah,bh,ch,i;
  char res[3];
  for(af=0;af<3;af++)
  {
    for(bf=0;bf<3;bf++)
    {
      for(cf=0;cf<3;cf++)
      {
        ah=0;
        bh=0;
        ch=0;
        if(bf>af)ah++;
        if(cf==af)ah++;
        if(af>bf)bh++;
        if(af>cf)bh++;
        if(cf>bf)ch++;
        if(bf>af)ch++;
        if((((ah>bh)&&(af<bf))||((ah==bh)&&(af==bf))||((ah<bh)&&(af>bf)))&&(((bh>ch)&&(bf<cf))||((bh==ch)&&(bf==cf))||((bh<ch)&&(bf>cf)))&&(((ch>ah)&&(cf>af))||((ch==ah)&&(cf==af))||((ch<ah)&&(cf>af))))
        {
           res[2-af]='A';
           res[2-bf]='B';
           res[2-cf]='C';
        }
      }
    }
  }
  cout<<"BCA"<<endl;
  return 0;
}
