The Speed of Sound

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

       int distance;
       String medium;
       int time;

       System.out.println("Please select medium: air, water, or steel");
       medium = scanner.nextLine();
       System.out.println("Please give the distance of a sound wave (in feets)");
       distance = scanner.nextInt();


       switch (medium)
       {
           case "Air":
           case "air":
               time = distance / 1100;
               System.out.println("It will take " + time + " seconds");
               break;

           case "Water":
           case "water":
               time = distance / 4900;
               System.out.println("It will take " + time + " seconds");
               break;

           case "Steel":
           case "steel":
               time = distance / 16400;
               System.out.println("It will take " + time + " seconds");
               break;

           default:
               System.out.println("WRONG MEDIUM");
               break;
       }
    }
}