#include using namespace std; typedef signed long long ll; #undef _P #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) //------------------------------------------------------- int N,D; void solve() { int i,j,k,l,r,x,y; string s; cin>>N>>D; string S; while(N) { if(D==2*N) { S+="B"; D-=2; } else if(D) { S+="A"; D--; } else S+="C"; N--; } cout<