Do-While) Collatz

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        System.out.print("Starting number: ");
        Scanner keyboard = new Scanner(System.in);
        int input = keyboard.nextInt();

        int steps = 1;

        if (input <10){
            System.out.print(input +"   \t");
        }else if(input <100){
            System.out.print(input +"  \t");
        }else if (input <1000){
            System.out.print(input +" \t");
        } else {
            System.out.print(input + "\t");
        }

        do {
            if (input % 2 == 0) {
                input = input / 2;
                if (input <10){
                    System.out.print(input +"   \t");
                }else if(input <100){
                    System.out.print(input +"  \t");
                }else if (input <1000){
                    System.out.print(input +" \t");
                } else {
                    System.out.print(input + "\t");
                }
            } else {
                input = ((3 * input) + 1);
                if (input <10){
                    System.out.print(input +"   \t");
                }else if(input <100){
                    System.out.print(input +"  \t");
                }else if (input <1000){
                    System.out.print(input +" \t");
                } else {
                    System.out.print(input + "\t");
                }
            }
            steps ++;
            if (steps % 10 == 0){
                System.out.println();
            }
        } while (input != 1);
    }
}