Which is an explicit substitute if the learner does not know the full Qunut?

Witr: Structure, Qunut, Missed Qunut, and Ramadan Congregation

• Say 'Allahummaghfir li' 3 times.
• Remain silent and omit Qunut in every Witr.
• Recite any unrelated conversation.
• Repeat the opening Takbir 7 times.