nuko   -> part_a  *
5           5
12         12

part_a -> part_b
 5         1
12         25

part_b -> part_c
1           1
25         25

part_c -> part_d
 1         2
25         51

part_d -> part_e
2           2
51         51

part_e -> part_f
 2         5
51         12

part_f -> part_g
5           5
12         12

part_g -> part_h
 5         1
12         25