ruby, 80 bytes

Result

WA

Duration

649ms

Code [DL]

puts gets.chars.map {|c| (97 <= c.ord && c.ord <= 122) ? 0 : 1}.map(&:to_s).join

stdin

aBcdeFGhijklMNoPQRstuvwxYz

stdout

010001100000110111000000101

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffcc46f3660 /* 9 vars */) = 0
12    execve("/usr/local/ruby-2.7.1/bin/ruby", ["/usr/local/ruby-2.7.1/bin/ruby", "/volume/CODE"], 0x565285438d60 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x565285438d40 /* 9 vars */) = 0
11    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
12    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=6, si_stime=1} ---
10    +++ exited with 0 +++