What is the printout of the following switch statement?

char ch = 'a';  
switch (ch){
      case 'a':
      case 'A': System.out.print(ch); break;
      case 'b':
      case 'B': System.out.print(ch); break;
      case 'c':
      case 'C': System.out.print(ch); break;
      case 'd':
      case 'D': System.out.print(ch);
}