U0 SubSwitch()
{
  I64 i;
  for (i=0;i<10;i++)
    switch (i) {
      case 0: "Zero ";  break;
      case 2: "Two ";   break;
      case 4: "Four ";  break;
      start:
        "[";
        case 1: "One";  break;
        case 3: "Three";break;
        case 5: "Five"; break;
      end:
        "] ";
        break;
    }
  '\n';
}

SubSwitch;