Given two strings A
and B
of lowercase letters, return true
if and only if we can swap two letters in A
so that the result equals B
.
Example 1:
Input: A = "ab", B = "ba"
Output: true
Example 2:
Input: A = "ab", B = "ab"
Output: false
Example 3:
Input: A = "aa", B = "aa"
Output: true
Example 4:
Input: A = "aaaaaaabc", B = "aaaaaaacb"
Output: true
Example 5:
Input: A = "", B = "aa"
Output: false
Note:
0 <= A.length <= 20000
0 <= B.length <= 20000
A
andB
consist only of lowercase letters.
参考资料: