using System;
public class Solution {
public string solution(string[] arr) {
string answer = "";
for(int i=0;i<arr.Length;i++) answer += arr[i];
return answer;
}
}
using System;
public class Solution {
public string solution(string[] arr) {
string answer = "";
for(int i=0;i<arr.Length;i++) answer += arr[i];
return answer;
}
}