#include //#include using namespace std; //using namespace atcoder; typedef long long ll; typedef pair P; //typedef modint998244353 mint; #define rep(i,a,b) for(int i=a;i=b;i--) ll n; ll c[200]; ll o,t,m; int main(void){ cin.tie(0); ios::sync_with_stdio(0); cin>>n; rep(i,0,n){ cin>>c[i]; if(c[i]==1){ o++; }else if(c[i]==2){ t++; }else if(c[i]>2){ m++; } } if((o%2==1&&m==0)||(o%2==1&&t==1)){ cout<<"A"<