1  2  3  4  5  …  18  19  20  21  22
12.31–1.4  1.5–1.9  1.10–1.14  1.15–1.19  1.20–1.24  …  3.25–3.29  3.30–4.3  4.4–4.8  4.9–4.13  4.14–4.19