public class ÖvnV1ö3 {
    public static void main(String[] args) {

        String str1 = "Erik";
        String str2 = "MoaSchaffer";
        System.out.println(stringMerger(str1, str2));
        System.out.println(recursiveMerger(str1,str2));
    }


    private static String shortestString(String str1, String str2){

        if(str1.length() < str2.length()){
            return str1;
        }else{
            return str2;
        }
    }

    private static String stringMerger(String str1, String str2){

        StringBuilder sb = new StringBuilder();

        String shortestString = shortestString(str1, str2);
        String longestString = str1.length() < str2.length() ? str2 : str1;

        for (int i = 0; i < shortestString.length(); i++) {
                sb.append(str1.charAt(i));
                sb.append(str2.charAt(i));
        }

        sb.append(longestString.substring(shortestString.length()));
        return sb.toString();
    }

    private static String recursiveMerger(String str1, String str2){

        if(str1.length()==0){
            return str2;
        }else if(str2.length()==0){
            return str1;
        }else{
            return "" + str1.charAt(0) + str2.charAt(0) + recursiveMerger(str1.substring(1),str2.substring(1));
        }
    }
}