bash-pure, 104 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 write $i;done;done

stdin

8953254001481683354013703660448339859432055758865296947501772878601067993063765169802159720370394997

stdout

stderr

strace