# include<bits/stdc++.h> using namespace std; int main() { char a[1000001] = {}; cin >> a; for (int i = 0; i < strlen(a); i++) { if (a[i] >= 65 && a[i] <= 90 || a[i] >= 97 && a[i] <= 122) { cout << a[i]; } return 0; } }