Set 121 : 18
R1
L2
1
2R
3
3
4R
5L
6R
4
7
5
R6
8
7
9
8
R9
L10
10
11R
12L
11
13
14R
12
R13
L14
15
15
R16
16
17
R18
17
18R
19
R20
L21
52 m 32 s |