Patrick is answering a series of questions where he is given a word and he has to write a single character. He knows how to answer these and quickly answers-
While answering, he took a break. However, when he returned from the break, he forgot the process he found the answers, help him figure out the following-
fdhdbmhwmh$\to \ ?$
bmhsmhwfwdh$\to \ ?$
smhdfwsfdbmh$\to \ ?$
b means both
b are valid answers. In case of multiple answers any valid one is accepted.
Don't sweat over the wordplay tag, it really isn't necessary to solve the puzzle.