there seem to be some problems with the testsuite, in particular some of those matrices contain different number of elements per row (e.g. perhaps "5,7" should be "5.7"). I guess the same applies to your example dataset where the last row contains only four numbers instead of five?
I have fixed test suite.
The test sets 2,3,5, and 6 have a problem with x. It should probably read 5.7 and not 5,7
Make a Palindrome Number
Maximum running product for a string of numbers
It dseon't mettar waht oedrr the lrettes in a wrod are.
Flip the main diagonal of a matrix
Deleting an element in a matrix
Repeat string n times - 3
Modular multiplicative inverse
Digit concentration in Champernowne's constant
Recaman Sequence - II
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