1+1
2
6+6
12
11+11
22
16+16
32
21+21
42
2+2
4
7+7
14
12+12
24
17+17
34
22+22
44
3+3
6
8+8
16
13+13
26
18+18
36
23+23
46
4+4
8
9+9
18
14+14
28
19+19
38
24+24
48
5+5
10
10+10
20
15+15
30
20+20
40
25+25
50
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