Stair-climbing puzzle: Revision history

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13 September 2015

13 January 2015

8 January 2015

3 January 2015

28 August 2014

27 July 2014

12 July 2014

20 May 2014

19 June 2013

30 April 2013

23 November 2012

22 November 2012

6 October 2012

24 July 2012

14 May 2012

11 February 2012

23 August 2011

25 July 2011

9 July 2011

30 May 2011

26 May 2011

24 May 2011

21 May 2011

21 March 2011

10 March 2011

3 February 2011

5 November 2010

3 November 2010

20 October 2010

28 August 2010

20 August 2010

1 July 2010

19 June 2010

13 May 2010

17 March 2010

11 March 2010

6 February 2010

17 January 2010

2 January 2010

30 December 2009

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