/^N(?!.*00$).*$/  750772/s * 0.01 + 536004/s * 0.99 = 538151.68/s   --
/^N.*(?!00)..$/   278229/s * 0.01 + 540980/s * 0.99 = 538352.49/s   0%
/^N(?!.*00$)/     743994/s * 0.01 + 633900/s * 0.99 = 635000.94/s  18%
/^N.*(?<!00$)$/   330512/s * 0.01 + 789866/s * 0.99 = 785272.46/s  46%