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Create 1790.py

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	`1`	`+class Solution(object):`
	`2`	`+ def areAlmostEqual(self, s1, s2):`
	`3`	`+ """`
	`4`	`+ :type s1: str`
	`5`	`+ :type s2: str`
	`6`	`+ :rtype: bool`
	`7`	`+ """`
	`8`	`+ i=-1`
	`9`	`+ j=-1`
	`10`	`+ cnt=0`
	`11`	`+ for k in range(0, len(s1)):`
	`12`	`+ if s1[k]!=s2[k]:`
	`13`	`+ cnt+=1`
	`14`	`+ if i==-1: i=k`
	`15`	`+ elif j==-1: j=k`
	`16`	`+`
	`17`	`+ if cnt==0: return True`
	`18`	`+ elif cnt==2 and s1[i]==s2[j] and s1[j]==s2[i]: return True`
	`19`	`+`
	`20`	`+ return False`

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