#include<iostream> #include<cstdio> using namespace std; int main() { string a; string b; while(cin >> a >> b) { int n[26]={0}; for(int i = 0; i < a.length(); i++) { int pos = -1; pos = b.find(a[i]); if(pos != -1) n[a[i]-'a'] = 1; } for(int i = 0; i < 26; i++) if(n[i] != 0) { cout << (char)(i + 'a'); } cout << endl; } return 0; } |
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