Update ScrambleString.java

Submission Result: Compile Error

Line 33: cannot find symbol: variable middl2

Submission Result: Runtime Error L 9

Last executed input:	"aa", "aa"


Submission Result: Wrong Answer [the tree could be unbalanced]

Input:	"abab", "aabb"
Output:	false
Expected:	true

Submission Result: Time Limit Exceeded

Last executed input:	"abcdefghijklmnopq", "efghijklmnopqcadb"