View Code of Problem 43

#include <iostream>
#include <vector>
using namespace std;
int main(){
	string str;
	string result; 
	cin>>str;
	for(int i=0;i<str.size();i++){
		if((str[i]<='z'&&str[i]>='a')||(str[i]>='A'&&str[i]<='Z')){
			result.push_back(str[i]);
		}
	}
	cout<<result;
}