#include using namespace std; using ll=long long; using pll=pair; using tll=tuple; using ld=long double; const ll INF=(1ll<<60); #define rep(i,n) for(ll i=0;i<(ll)(n);i++) #define all(v) v.begin(),v.end() template void chmin(T &a,T b){ if(a>b){ a=b; } } template void chmax(T &a,T b){ if(a> t; while(t--){ ll n; cin >> n; string ans="ABC"; while((ll)ans.size()<3*n){ char c=ans.back(); ans.pop_back(); ans.push_back('A'); ans.push_back(c); ans+="BC"; } cout << ans << '\n'; } }