please recheck your testsuite.ps:may I suggest you finish some problems by yourself before you create one.because this kinda problem had been repeated like hundreds times.we really tired of seeing this.
I fixed the problem in the test suite.
Back to basics 22 - Rotate a matrix
Given a matrix, swap the 2nd & 3rd columns
Concatenate two strings
Convert yards to feet
Create a Standard Size Vector
Square a Number
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