How can I change the target key combos?

[soerenwolfers]

With many matches, the target key combinations are

1: single keys 2: double keys starting with "m" 3: ... "f" 4: ... "j" 5: ... ";"

I would like to change the order mfj; to jf;a (m isn't as quickly accessible as the others)

I noted that mfj; appeared in that order in the end of g:EasyMotion_keys, so I tried

let g:EasyMotion_keys = "asdghklqwertyuiopzxcvbnjf;a".

Unfortunately, it seems the characters in this list must be unique. I don't want to change the first a to an m thought, because that makes m the preferred single character target key. Can that be changed? What speaks against being able to have j (or any other character) be both the preferred combo starter key and the preferred single key? One could still omit j as the second character in combos starting with j and the same with f,;, and a.