String str1 = "adana", str2 = "ankara", space = "";
for (int i = 0; i < str1.length(); i++) {
if (str1.charAt(i) == str2.charAt(i)) {
System.out.println(str1.charAt(i) + space + "+");
space += " ";
} else {
System.out.println(str1.charAt(i) + space + "-");
space += " ";
}
}