public static char findTheDifference(String first, String second){

char result = ' ';

char[] firstWord = first.toCharArray();

char[] secondWord = second.toCharArray();

for( int i = 0; i < firstWord.length; i++ ){

for( int j = 0; j < secondWord.length; j++ ){

if( firstWord[i] == secondWord[j] ){

firstWord[i] = ',';

secondWord[j] = ',';

try{

Thread.sleep(3000);

System.out.println("Iteration " + (i+1));

System.out.println(Arrays.toString(firstWord));

System.out.println(Arrays.toString(secondWord));

System.out.println();

}catch (InterruptedException e){

System.out.println(e.getMessage()); }

break;

}

}

}

for( char found : secondWord ){

if( found != ','){

result = found;

break;

}

}

return result;

}

public static void main(String[] args) {

System.out.println(findTheDifference("aaaaee", "eaabaae"));

}