#include <iostream> using namespace std; int main(){ int n; cin>>n; int q=0,b=0,c=0; int a[n+1]; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=n;i++){ if(a[i]==1){ q++; } else if(a[i]==2){ b++; } else if(a[i]==3){ c++; } cout<<a[i]; } if(q>b&&q>c){ cout<<"A"; } if(c>b&&c>q){ cout<<"C"; } if(b>q&&b>c){ cout<<"B"; } if(q==b&&b>=c||c==b&&b>=q||q==c&&c>=b){ cout<<"NONE"; } return 0; }