When he had completed the probation, while deserving the trial period, he committed one unconcealed offense of intentional emission of semen. He told the monks, “I had committed one offense of intentional emission of semen, concealed for five days. I asked the Sangha to give me probation for five days for that offense, which it did. While on probation, I committed one unconcealed offense of intentional emission of semen. I asked the Sangha to send me back to the beginning for that offense, which it did. When I had completed the probation, while deserving the trial period, I committed one unconcealed offense of intentional emission of semen. What should I do now?” They told the Buddha. “Well then, the Sangha should send the monk Udāyī back to the beginning for one unconcealed offense of intentional emission of semen, committed while deserving the trial period.

And it should be done like this.