1440 Stedman Doubles
Daniel W Brady

23145  2  6  8
4231   s  s  s
1243   s  s ss
3124   s  s  s*
six part

omit s* from parts 3 & 6.

Every row occurs once at every row of quick and slow sixes.

Shorten to 1260 by omitting ss in two parts 
in first half and one in second, or vice versa

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