s/^ *bc[xyz] *= *//
s/[']\([a-zA-Z0-9_]*\)[']/'\1:\1'/g
h
s/[']\([a-zA-Z0-9_]*\):[a-zA-Z0-9_]*['] *,*/\1 /g
w bot
g
s/['][a-zA-Z0-9_]*:\([a-zA-Z0-9_]*\)['] *,*/\1 /g
w top
d