What Will Be The Output Of The Following Codep Pre Langc #1149

 #include <iostream> #include<string> using namespace std; void func1(string input,string output) { if(input.length()==0) { cout<<output<<","; return; } for(int i=0;i<=output.length();i++) func1(input.substr(1),output.substr(0,i) + input[0] + output.substr(i)); }  int main() { char str[] = "AB";  func1(str, ""); return 0; }