@@ -0,0 +1,229 @@
+// http://codingbat.com/prob/p168564%0A%0Apublic String comboString(String a, String b) %7B%0A  if (a.length() %3C b.length()) %7B%0A    return a + b + a;%0A  %7D%0A  else if (b.length() %3C a.length()) %7B%0A    return b + a + b;%0A  %7D%0A  else return %22%22;%0A%7D%0A

Create comboString.java