High School Question about magnetizing and the First law of Thermodynamics

[Emeth]

TL;DR

If you make two magnets with a pea inbetween them so they squash the pea upon their creation where does the energy squashing the pea come from?

I've been learning a lot about life from Internet searches and I do hope this isn't too basic of a question for you gurus.
If I had two pieces of iron next to each other with a pea in-between and two pieces of cobalt with a pea in-between. Then I magnetized the four pieces of metal by brushing them with magnets so that the pea was pushed on by the created magnets. Could you use exactly the same mechanical power to make those magnets? If so would one pea have more energy exerted on it?

 

[anuttarasammyak]

Summary:: If you make two magnets with a pea inbetween them so they squash the pea upon their creation where does the energy squashing the pea come from?

After the pea crash the two magnets are closer in distance so electromagnetic field energy in space is lessened. The pulled out energy was used to crash the pea.