Metric: (n,0) = n = 1 move and / = 1 move
E slice piece is ignored

2 cycle (first two pieces to the left of the slice) (28)
1/5/1/5/2/1/-3/-4/-3/-3/-1/4/2/4/

swap all 9 pairs of adjacent pieces (first two pieces to the left of the slice, then the rest) (34)
1/-5/2/5/5/2/-5/-5/1/-5/-5/5/-5/-5/5/-5/1/


All 18*17/2 = 153 2-cycles (algorithms):
Depth Positions
26 42
27 68
28 38
29 4
30 1