❔ need help with a problem

using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        int t = int.Parse(Console.ReadLine());
        
        for (int i = 0; i < t; i++){
           string s = Console.ReadLine();
           for (int o = 0; o < s.Length; o++){
               if (o % 2 == 0){
                   Console.Write(s[i]);
               }
           }
           for (int o = 0; o < s.Length; o++){
               if (o % 2 == 1){
                   Console.Write(s[i]);
               }
           } 
        }
    }
}