Which pulley do you pull the belt over last?

Spring is completely off the idler pulley, upper bolt off damper, belt looped around idler, and idler pulley pressed down against two other pulleys. Belt looped around alternator pulley, crank pulley, & AC clutch, and the other looped over water pump pulley. Can't get it over PS pulley.

It is the original belt on the car. The 601 in my 190D is easy to do, but I'm struggling with the 606.

Thanks.