Question about rule
Tell me please, masters, does hashcat supports the rules of the type like a7, a8....aZ?
aN Check word with all possible symbol cases
N is maximal length of the passwords to apply this rule on.
maby other way of writing?
use -r rules/hybrid/append_s.rule
no man, you dont understand me
if i have word "deflagration" in my .dic but real password is defLAgRATioN rule aC can found it
Then why not just say it this way?

We call it toggle attack. But its better use rules, see here for a detailed description:

just do: -r rules/toggles5.rule