#include #define rep(i,n) for(ll i = 0; i < n; i++) //[0,n) #define srep(i,a,b) for(ll i = a; i < b; i++) //[a,b) #define all(A) (A).begin(),(A).end() #define rall(A) (A).rbegin(),(A).rend() #define pmt(A) next_permutation(all(A)) using namespace std; using ll = long long; using ull = unsigned long long; using P = pair; using pq = priority_queue,greater

>; const ll inf = 1LL<<60; const int iinf = (int)1e9+1; const int mod9 = 998244353; const int mod1 = 1000000007; struct Edge { int to; long long cost; int from; }; bool compe(const Edge &e,const Edge &e2){ return e.cost < e2.cost; } using Graph = vector>; using SGraph = vector>; template int siz(T& a){return (int)a.size();} ll squa(ll a){ return a*a; } ll mceil(ll a,ll b){ return (a+b-1)/b; } int main(void){ int T; cin >> T; while(T--){ int N; cin >> N; cout << "ABACBC"; rep(i,N-2) cout << "ABC"; cout << endl; } }