Practicing Success
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. H _ Z _ H O Z C H O _ D _ O _ E H _ Z F |
O B Z H Z O O C Z H Z H O B H O Z O H B Z H H O |
O B Z H Z O |
H O Z B / H O Z C / H O Z D / H O Z E / H O Z F 1 is added to the last letter O B Z H Z O |