Various arrangements of wheel orders are specified to be run on the bombe.
It may be specified that all 60 wheel orders be run. (abbr. 60. w/os) Sometimes
it is specified that we run the left (right) hard side of the w/o sheet only
(abbr. L.H.S. or R,H.S,) It may be required that we use only the nigel Y w/os
on the left had side of the w/o sheet. The Nigelian wheel orders are listed
below. They are referred to as Nigel X,Y,or Z.