Installing a bathroom in garage i messed up

[HarleyJ]

So I jackhammered out my slab in the garage for a bathroom/kitchen addition and got my plumbing in and concrete poured back. Everything looks good, but then I realized that I stubbed up directly under where sinks will go, kitchen won't be bad with double sink , but the lav it's like a straight shot down through the floor, how is the best way to get a p trap in here without making it an S trap?