bash-pure, 49 bytes

Result

WA

Code [DL]

while read -n1 c;{ a[c]+=$c;}
IFS=;echo "${a[*]}"

stdin

3448954116877520525674335618511014981755184503024751504866780774093759852357397077969705413622652803

stdout

stderr

/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
/code.bash: line 3: syntax error: unexpected end of file

strace