Given two strings X and Y (call letters in uppercase). Check if it is possible to convert X to Y by performing following operations.
First line of the input contains no of test cases T,the T test cases follow.
Each test case consist of 2 space separated integers A and B denoting the size of string X and Y respectively
The next two lines contain the 2 string X and Y.
For each test case print the "Yes" if it's possible to convert X to Y by performing following operations else "No".
'A'<=X[i] , Y[i]<='Z'
2 5 3 daBcd ABC 4 3 ABcd BCD Output : Yes No
Test Case 1: daBcd -> dABCd -> ABC Covert a and b at index 1 and 3 to upper case, delete the rest those are lowercase. We get the string Y so the output is: Yes.
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