Iteration 0: ok
Iteration 1: ok
Iteration 2: ok
Iteration 3: ok
Iteration 4: ok
Iteration 5: ok
Iteration 6: ok
Iteration 7: ok
Iteration 8: ok
Iteration 9: ok
Iteration 10: ok
Iteration 11: ok
Iteration 12: ok
Iteration 13: ok
Iteration 14: ok
Iteration 15: ok
Iteration 16: ok
Iteration 17: ok
Iteration 18: ok
Iteration 19: ok