Grouping by nn(for check)

for(;s=readline(a=[]).split(' ');){
for(j=0;c=s[j++];)a[c]=+[a[c]]+1
for(i=99;--i;)for(j=0;j<10;)i==a[j++]&&putstr(i)
print()
}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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