t = int(input())

for _ in range(t): s = input() even_chars = s[::2]
odd_chars = s[1::2]
print(even_chars, odd_chars)

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner sc= new Scanner(System.in);
    int T=Integer.parseInt(sc.nextLine());
    for(int t=0;t<T;t++){
        String inp=sc.nextLine();
    char c[]= inp.toCharArray();
   String even="";
   String odd="";
    for(int i=0;i<c.length;i++)
    {
        if(i%2==0)
        even+=c[i];
        else
       odd+=c[i];   
    }
    System.out.println(even+" "+odd);
}

} }

JAVA SOLUTION

Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        sc.nextLine();
        for (int t = 0; t < T; t++) {
            String st = sc.nextLine();
            char[] ch = st.toCharArray();
            for (int i = 0; i < st.length(); i++) {
                if (i % 2 == 0) {
                    System.out.print(ch[i]);
                }
            }
            System.out.print(" ");
            for (int i = 0; i < st.length(); i++) {
                if (i % 2 != 0) {
                    System.out.print(ch[i]);
                }
            }
            System.out.println();
        }

My python3 solution. Let me know if there are any improvements to be made

args = int(input().strip())

for _ in range(args):
    
    text = input().strip()
    
    for i in range(len(text)):
        even = text[::2]
        odd = text[1::2]          
    print(f"{even} {odd}")

C# Solution 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 */
    //number of test cases 
    int n = Convert.ToInt32(Console.ReadLine());

    string[] s = new string[n];

    for(int i = 0; i < s.Length; i++)
    { 
        string even = string.Empty;
        string odd = string.Empty;

        s[i] = Console.ReadLine();

        /*Note that :
         string is an array of characters therefore will will convert the 's[i]' to array of 'char'.
        */
        char[] c = s[i].ToCharArray();

        for(int j = 0; j < c.Length ; j++)
        {
            // use modulus '%' to check remainder from the indexes
            if(j % 2 == 0)
              even += c[j]; 
            else
              odd += c[j];       
        }
        Console.Write($"{even} {odd}");
        Console.WriteLine();
    }    


}

}