/**
 * This function takes two strings as input and concatenates them. However, it should not include any characters from string1 that are present in string2.
 *
 * @param string1 The first string.
 * @param string2 The second string.
 * @return The concatenated string without any characters from string1 that are present in string2.
 */
fun concatenateStrings(string1: String, string2: String): String {

    var concatenatedString = ""

    // Iterate through each character in string1
    for (char1 in string1) {
        // Check if the character is not present in string2
        if (char1 !in string2) {
            concatenatedString += char1
        }
    }

    return concatenatedString
}
/**
 * This function takes two strings as input and concatenates them. However, it should not include any characters from string1 that are present in string2.
 *
 * @param string1 The first string.
 * @param string2 The second string.
 * @return The concatenated string without any characters from string1 that are present in string2.
 */
fun concatenateStrings(string1: String, string2: String): String {
/**
 * This function takes two strings as input and concatenates them. However, it should not include any characters from string1 that are present in string2.
 *
 * @param string1 The first string.
 * @param string2 The second string.
 * @return The concatenated string without any characters from string1 that are present in string2.
 */
fun concatenateStrings(string1: String, string2: String): String {

    var concatenatedString = ""

    // Iterate through each character in string1
    for (char1 in string1) {
        // Check if the character is not present in string2
        if (char1 !in string2) {
            concatenatedString += char1
        }
    }

    return concatenatedString
}