On Feb 26, 2015, at 3:00 PM, Ethan Furman <ethan at stoneleaf.us> wrote: > On 02/26/2015 11:54 AM, Ian Kelly wrote: > >> Sometimes I wonder whether anybody reads my posts. > > It's entirely possible the OP wasn't ready to understand your solution four days ago, but two days later the OP was. Thank you Ethan, that was precisely my problem. Thanks, Cem Karan