Disallow character

Disallow characters!
The “” is disallowed messages is excluded.
example


hello!
e is disallowed.


hllo
a is disallowed


i n33d h3lp
3 is disallowed


etc

start

wate
r is disallowed.

oh okay
o is disallowed.

00f b0i
0 is disallowed

nu. dis is nat alluwued
e is disallowed.