cardinal, 182 bytes

Result

WA

Code [DL]

%+++=t+=:v
x
>d  -    v
#+  vJ   <
MVv0<
=
- (^
J> "0"
><(^
-
J> "1"
><(^
-
J> "2"
><(^
-
J> "3"
><(^
-
J> "4"
><(^
-
J> "5"
><(^
-
J> "6"
><(^
-
J> "7"
><(^
-
J> "8"
><(^
 > "9"
><(

stdin

2308964609701891215289078032527927607340011897128549213773311131905160377647756132291686121364232043

stdout

000000000000000000000000000111111111111122222222222333333344444555555555666666666666777

stderr

Traceback (most recent call last):
  File "/home/esolang/interpreters/cardinal.py", line 187, in <module>
    ip.go()
  File "/home/esolang/interpreters/cardinal.py", line 112, in go
    self.a = ord(code[x - pdx, y - pdy])
KeyError: (3, 34)

strace