node, 95 bytes

Result

AC

Duration

555ms

Code [DL]

console.log(require("fs").readFileSync(0, "UTF-8").replace(/[A-Z]/g,"1").replace(/[a-z]/g,"0"))

stdin

AbCdeFGHijkLmnOPQRstuVwxyz

stdout

10100111000100111100010000

stderr

strace

13    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffec25fb6c8 /* 7 vars */) = 0
15    execve("/usr/bin/node", ["/usr/bin/node", "/volume/CODE"], 0x7f982c573240 /* 7 vars */ <unfinished ...>
14    execve("/bin/cat", ["cat", "-"], 0x7f982c573230 /* 7 vars */ <unfinished ...>
15    <... execve resumed>)             = 0
14    <... 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} ---
18    +++ exited with 0 +++
17    +++ exited with 0 +++
16    +++ exited with 0 +++
19    +++ exited with 0 +++
20    +++ exited with 0 +++
21    +++ exited with 0 +++
15    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=2, si_stime=2} ---
13    +++ exited with 0 +++