ESQ Co. had 10,000 shares of common stock outstanding on January 1, 2010. On February 2, 2010, ESQ purchased back 1,000 its own shares and put them in treasury. On July 20, 2010, ESQ resold 500 shares of treasury shares. On November 15, 2010, ESQ had a 2-for-1 split. On Dec 12, 2010, ESQ declared a 10% stock dividends. What should be the number of common shares outstanding at the end of 2010?