N⊂Z⊂Q⊂C⊂R\mathbb{N} \subset \mathbb{Z} \subset \mathbb{Q} \subset \mathbb{C} \subset \mathbb{R}N⊂Z⊂Q⊂C⊂R
N⊂Q⊂Z⊂R⊂C\mathbb{N} \subset \mathbb{Q} \subset \mathbb{Z} \subset \mathbb{R} \subset \mathbb{C}N⊂Q⊂Z⊂R⊂C
N⊂Z⊂Q⊂R⊂C\mathbf{N} \subset \mathbb{Z} \subset \mathbb{Q} \subset \mathbb{R} \subset \mathbb{C}N⊂Z⊂Q⊂R⊂C
N⊂Q⊂Z⊂C⊂R\mathbb{N} \subset \mathbb{Q} \subset \mathbb{Z} \subset \mathbb{C} \subset \mathbb{R}N⊂Q⊂Z⊂C⊂R