ruby, 20 bytes

Result

WA

Duration

556ms

Code [DL]

$<.bytes{p 5./_1/16}

stdin

ABcDefGhIjKlMNoPQRStuVWXYZ

stdout

stderr

/volume/CODE:1:in `<main>': undefined method `bytes' for ARGF:ARGF.class (NoMethodError)

strace

13    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe01158cf8 /* 9 vars */) = 0
14    execve("/bin/cat", ["cat", "-"], 0x7fe89654c240 /* 9 vars */ <unfinished ...>
15    execve("/usr/local/ruby-latest/bin/ruby", ["/usr/local/ruby-latest/bin/ruby", "/volume/CODE"], 0x7fe89654c260 /* 9 vars */ <unfinished ...>
14    <... execve resumed>)             = 0
15    <... execve resumed>)             = 0
14    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
15    +++ exited with 1 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=1, si_utime=5, si_stime=0} ---
13    +++ exited with 1 +++