#include #include #include #include using namespace std; typedef long long lint; typedef vectorvi; typedef pairpii; #define rep(i,n)for(int i=0;i<(int)(n);++i) int main(){ string s;cin>>s; string t=s; sort(t.begin(),t.end()); t.erase(unique(t.begin(),t.end()),t.end()); for(char c:t){ int a=0; int idx=-1; rep(i,s.size())if(s[i]==c)a++,idx=i+1; if(a==1){ cout<