33 engines. There’s no way to achieve the thrust necessary with one engine. They will achieve success, watch.
Shuttle: 5 engines + SRBs
Artemis: 4 engines + SRBs
Apollo: 5 engines
Saturn F-1: 1.75 million pounds of thrust each.
Falcon: 0.53 million pounds of thrust each.
The Saturn V never failed to launch. Ever.