Macbook air firmware password to unlock

My macbook air is 2012 years production, through the network recovery upgrade once Lion system, start again, according to the Commond + S or option button to enter all need password, search the web for once, at the same time hold down shift + option + command + S will appear a 33 a Hash code, my Hash code is: C02217704K7DYKKAC59995D460289D4F5, please each elder to answer it, how to work out the password?

thank you !