+?
40 → 41 +1 → 44 +3 → ?? +?
41 → 42 +1 → 45 +3 → ?? +?
42 → 43 +1 → 46 +3 → ?? +?
43 → 44 +1 → 47 +3 → ?? +?
44 → 46 +2 → 49 +3 → ?? +?
8 → 8 ±0 → 9 +1 → ?? +?
9 → 9 ±0 → 10 +1 → ?? +?
16 → 16 ±0 → 17 +2 → ?? +?
17 → 17 ±0 → 18 +2 → ?? +?
18 → 18 ±0 → 20 +2 → ?? +?
19 → 19 ±0 → 21 +2 → ?? +?
20 → 20 ±0 → 22 +2 → ?? +?
21 → 