View Code of Problem 43

#include<iostream>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<string>
#include<cmath>

using namespace std;

int main()
{
	string str;
	while (getline(cin, str)) {

		for (int i = 0; i < str.size(); i++) {

			if (isalpha(str[i]))
				cout << str[i];
		}

		cout << endl;
	}
}