MD5 hash seed? Find the hash that hashes to this

Hi Guys,

This is my first post so hello to everyone.

I'm new to hashing and working on assignment. 

Quote:You've registered as user 'nOOB’ and have been given the hash chain seed <here is the hash1>

The given hash is MD5 and crack to inverted case of the username -> Noob 

Quote:Use the given information to figure out how to authenticate as the user 'ECSC' for the given challenge hash <here is the hash2> 
i.e. Find the hash that hashes to this - This hash will be your solution.

Knowing that the case is flipped echo -n ecsc | md5sum should give me my new seed.

seed = MD5(ecsc)
hash_0 = H(seed)
hash_1 = H(hash_0)
hash_2 = H(hash_1)
...
hash_n = H(hash_n-1)

How do I run hash chain to confirm that this is correct seed? Is there any other approach I could take?