SARDINE
        (pull out "A" and replace with "B")
BINDERS
        (pull out "B" and replace with "C")
DISCERN
        (pull out "C" and replace with "F")
FRIENDS
        (pull out "D" and replace with "E")
REFINES
        (pull out "E" and replace with "G")
FINGERS
        (pull out "F" and replace with "S")
SINGERS
        (pull out "G" and replace with "U")
SUNRISE
        (...)