int main()
{
    int a,b,c,a0,b0,c0,x=0;                                                     //??a?b?c???A?B?C???a0?b0?c0?????????? 
    for(a=0;a<=2;a++)                                                           //????a?b?c 
    {
        for(b=0;b<=2;b++)
        {
            if(b==a)continue;                                                   //??b=a??? 
            c=3-a-b;                                                            //???????c??0?1?2????? 
            a0=(b>a)+(c==a);
            b0=(a>b)+(a>c);
            c0=(c>b)+(b>a);
            if((a==(2-a0))&&(b==2-b0)&&(c==2-c0))                               //????? 
            {
                x=1;                                                            //x??????????????x=1?????? 
                break;
            }
        }
        if(x==1)break;
    }
    char ch[3];
    ch[a]='A',ch[b]='B',ch[c]='C';                                              //??a?b?c????????????? 
    cout<<ch[0]<<ch[1]<<ch[2];
    return 0;
}
