Alice sends a data packet two times to Bob. Let A and B are the strings of lowercase letters that represent the packets received by Bob.

computer science

Description

Alice sends a data packet two times to Bob. Let A and B are the strings of lowercase letters that represent the packets received by Bob. Bob compares the packets and accepts them only if he can swap two letters in A so that the result is equal to B. Now you are asked to help Bob in determing whether the packets can be accepted or not. Print 1 if the packets are acceptable or else print 0.


Input Format


A,B - Two strings of lowercase letters


Constraints


0<=len(A)<=100


0<=len(B)<=100


Output Format


Print 1 if packets are acceptable otherwise print 0


Sample Input 0


ab

ba

Sample Output 0


1

Explanation 0


You can swap A[0] = 'a' and A[1] = 'b' to get "ba", which is equal to B.


Sample Input 1


ab

ab

Sample Output 1


0

Explanation 1


The only letters you can swap are A[0] = 'a' and A[1] = 'b', which results in "ba" != B.


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