There's a bomb on the Helicarrier Bridge! And it's going to go off in 5 minutes unless you disarm it. S.H.I.E.L.D. analysts have decoded a transmission from Taskmaster to his operatives! Take a listen:

He's giving them the sequence to arm the bombs, so to disarm them, you'll probably have to input the opposite of  what Taskmaster says! Hurry , if the Bridge goes, we lose S.H.I.E.L.D!