View Code of Problem 55

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder stringBuilder = new StringBuilder(scanner.nextLine());
        StringBuilder newString = new StringBuilder();
        char a = scanner.next().charAt(0);
        for (int i = 0; i < stringBuilder.length(); i++) {
            char letter = stringBuilder.charAt(i);
            if (letter!=a){
                newString.append(letter);
            }
        }
        System.out.println(newString);
    }
}