#include <iostream>
#include <string>
#include <cstring>
using namespace std;
int main() {
	string str;
	char a;
	cout << "Enter the string: ";
	getline(cin, str);
	cout << endl << "Enter the letter: ";
	cin >> a;
	cout << endl;
	for (int i = 0; str[i] != 0; i++) {
		if (str[i] == a && str[i - 1] == ' ' || str[i] == a && i == 0) {
			while (str[i] != ' ' && str[i] != 0) {
				cout << str[i];
				i++;
			}
			cout << ends;
		}
	}
}