Why does Terminal ignore capital "B"?
Ok, The solution was not simple. but I found it in http://www.softpanorama.org/Scripting/Shellorama/inputrc.shtml.

When I ran bind -p i've noticed that I have a line like this per each char:

"A": self-insert


but not for "B". so I've ran:

bind -p &gt; ~/.inputrc


then I've edited the file and added the letter.

Great Success.