Problem Statement 
 Given a fraction, you can divide its numerator and denominator by one of their common divisors to get a fraction with the same value. For example, 8/16 can become 4/8 if you divide the numerator and denominator by 2. With some fractions, you can get a similar result by removing digits that are common to both the numerator and denominator. The removed digits must occur in the same relative order in both the numerator and denominator of the original fraction.
For example, consider 4784/7475. We can remove the 7 in the numerator and the first 7 in the denominator, and then remove the second 4 in the numerator and the 4 in the denominator to get 48/75, which has the same value as the original fraction.
You are given the numerator and denominator of a fraction. Use the procedure described above to get a fraction with the smallest possible numerator. Return the resulting fraction formatted as "NUMERATOR/DENOMINATOR" (quotes for clarity only), where both the numerator and denominator are written without leading zeroes. If the procedure cannot be applied, return the original fraction. 

Definition 
 Class:  AnomalousCancellation  Method:  reducedFraction  Parameters:  int, int  Returns:  String  Method signature:  String reducedFraction(int numerator, int denominator)  (be sure your method is public) 




Constraints 
  numerator and denominator will each be between 10 and 9999, inclusive. 

Examples 
0)  
  Returns: "1/4"  We can cancel the 6's to get 16/64=1/4. 


1)  
  Returns: "48/75"  This is the example from the problem statement. 


2)  
  Returns: "2/2"  The fraction can be reduced to 2/2 or 5/5. We choose 2/2 since it has the smallest numerator. 


3)  
  Returns: "5/1"  We can cancel the 9's to get 95/19=5/1. 


4)  
  Returns: "1/10"  We can cancel two 0's to get 100/1000=1/10. 


5)  
  Returns: "123/456"  The numerator and denominator have no digits in common, so the cancellation procedure can't be applied. 


6)  
  Returns: "1/7"  After cancelling the 1's and the 5's we get 151/1057=1/07, and we write the denominator without the leading zero. 

