Given two strings A
and B
of lowercase letters, return true
if you can swap two letters in A
so the result is equal to B
, otherwise, return false
.
Swapping letters is defined as taking two indices i
and j
(0-indexed) such that i != j
and swapping the characters at A[i]
and A[j]
. For example, swapping at indices 0
and 2
in "abcd"
results in "cbad"
.
Example 1:
Input: A = "ab", B = "ba"
Output: true
Explanation: You can swap A[0] = 'a' and A[1] = 'b' to get "ba", which is equal to B.
Example 2:
Input: A = "ab", B = "ab"
Output: false
Explanation: The only letters you can swap are A[0] = 'a' and A[1] = 'b', which results in "ba" != B.
Example 3:
Input: A = "aa", B = "aa"
Output: true
Explanation: You can swap A[0] = 'a' and A[1] = 'a' to get "aa", which is equal to B.
Example 4:
Input: A = "aaaaaaabc", B = "aaaaaaacb"
Output: true
Example 5:
Input: A = "", B = "aa"
Output: false
Solution: