rail, 625 bytes

Result

WA

Code [DL]

$ ':'
 \
  \-(!a!)(a)(a)#

$ 'pop'
 \
  \-(!a!)#


$ 'getb'
 \                           /-{pop}i{pop}(r)#
  \-80--(!r!)---{:}0g-------<
     /                       |
     |   /-0-                | 
     \-a--   >-q[0]im2(r)s1--/
         \-1-


$ 'isok'
 \                                /-(r)-#
  \-2m(!q!)[0](!r!)55m--{:}--1g--<
                      /           |
 @-------------------/            |
   \          \                   |
   |           >-q(q)ms1{:}{:}s1--/
   \-(!r!)[1]-/

$ 'f'
 \
  \--{getb}{isok}o-#

$ 'main' 
 |
 5
 9
 m
 5
 a           #
 \----{:}0g-<
   /         |
   |         |
   \-{f}s1---/

stdin

10010010
01111110
00110111
00000001
00101001
11011101
10010101
10100011
01011011
11101110
00100100
00000011
00001111
01111000
11110010
00010101
01010011
10111110
01001110
00001111
00001110
00111011
01100101
00101101
11100111
01010010
10001010
00011100
11110110
00010101
10101011
01101001
01100000
11010010
10001000
11100000
00010000
10011001
10111011
01110000
11011110
00001010
01010000
00000000
01000010
11111000
00011001
11111101
10011011
00000110

stdout

11111111111111111111111111111111111111111111111111

stderr

Crash: A read was attempted when there is no more inputIndex Out Of Bounds for the 'cut' command

strace