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Handy Conversion Sexagesimal (base 60) for Short URLs Cuts out ambiguous characters like: * l : lowercase l (looks like a 1 : one) * I : capital I (looks like a 1 : one) * O : capital O (looks like a 0 : zero) Based on work done by Tantek Çelik : [http://tantek.pbworks.com/New_base_60](http://tantek.pbworks.com/New_base_60 "tantek / New_base_60")