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#include<bits/stdc++.h>
using namespace std;
bool cmp(char a,char b){
char c1 = tolower(a);
char c2 = tolower(b);
return c1 < c2;
}
int main(){
string s;
char c[1000];
while(getline(cin,s)){
int cnt = 0;
for(int i = 0; i < s.length(); i++){
if(s[i] >= 'a' && s[i] <= 'z' || s[i] >= 'A' && s[i] <= 'Z'){
c[cnt++] = s[i];
}
}
stable_sort(c, c + cnt, cmp);
int j = 0;
for(int i = 0; i < s.length(); i++){
if(s[i] >= 'a' && s[i] <= 'z...
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