In this video, we will see a JAVA program for Print all interleaving of given two strings. 

So basically an interleaved string of given two strings preserves the order of characters in individual strings. For example, in all the interleaving of above first example, ‘A’ comes before ‘B’ and ‘C’ comes before ‘D’. 

Examples: 
String 1: AB 
String 2: C
 
Output: 
ABC
ACB 
CAB 

So, C is said to be interleaving A and B , if it contains all and only characters of A and B order of all characters in individual strings is preserved. 

Input: 
str1 = "WX", str2 = "YZ" 

Output: 
WXYZ 
WYXZ 
WYZX 
YWXZ 
YWZX 
YZWX 

Here the time complexity is O(2 ^ (m+n)). 

Print all interleaving of given 2 strings:
https://www.geeksforgeeks.org/print-all-interleavings-of-given-two-strings/