bash-pure, 108 bytes

Result

ERROR

Code [DL]

while read -s -n 1 C;do $((++a[C]));done;for i in {0..10};do for((j=a[i];j---1;));do o+=$i;done;done;echo $o

stdin

2919884992023423670934116046694323744310769452493789667767180962595859885732332529567932997517680942

stdout

stderr

strace