problema descifrare (3)

#include <bits/stdc++.h>
using namespace std;

signed main() {
    string s, ans;
    getline(cin, s);
    for (const char &ch : s) {
        if (isalpha(ch)) {
            ans += ch;
        }
    }
    puts(ans.c_str());
    return 0;
}