Alphabetack

Alphabetack is an esolang created by islptng. It's plan is to use all 26 characters.
It has a stack and a box. The box can hold any rational.

Commands

a add (box += pop())
b break
c continue
d divide (box /= pop())
e else (used for if)
f function (define a function, the name will be the box)
g get (box = pop())
h halt
i input (box = ord(input()))
j judge (if box != 0:)
k keep (NOP)
l less (if box < 0:)
m modulo (box %= pop())
n negate (box *= -1)
o output (print(chr(box)))
p push (push(box))
q quire length of stack
r reverse
s swap (swap box and top)
t take (pop())
u uno (box = 1)
v visualize (print(box))
w while (while True:)
x exit (to exit while,function,if)
y yield (yield a function called the box)
z zero (box = 0)