print('entry'); var label; var state; var decisions = [2, 2, 1, 3, 2, 2, 1, 3, 2, 3, 3, 1, 3, 2, 1]; var index = 0; function check() { if (index == decisions.length) throw 'HALT'; return decisions[index++] }
if (state == 2) {
 while(1) {
  print(2); state = check();
 }
}
while(1) {
 print(4); state = check();
 if (!(state == 4)) {
  break;
 }
}
print(3); state = check();
while(1) {
 print(1); state = check();
}