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10 → 1 + 0 = 1
11 → 1 + 1 = 2
12 → 1 + 2 = 3
13 → 1 + 3 = 4
14 → 1 + 4 = 5
15 → 1 + 5 = 6
16 → 1 + 6 = 7
17 → 1 + 7 = 8
18 → 1 + 8 = 9
19 → 1 + 9 = 10
20 → 2 + 0 = 2
21 → 2 + 1 = 3
22 → 2 + 2 = 4
23 → 2 + 3 = 5
24 → 2 + 4 = 6
25 → 2 + 5 = 7
26 → 2 + 6 = 8
27 → 2 + 7 = 9
28 → 2 + 8 = 10
29 → 2 + 9 = 11
30 → 3 + 0 = 3
31 → 3 + 1 = 4
32 → 3 + 2 = 5
33 → 3 + 3 = 6
34 → 3 + 4 = 7
35 → 3 + 5 = 8
The list is here.