s='A fractal is a natural phenomenon or a mathematical set that exhibits a repeating pattern that displays at every scale'
result = 12
Back and Forth Rows
Make a run-length companion vector
Replicate elements in vectors
construct matrix with identical rows
Check if a string starts with another string
Find matrix of indices for multidimensional matrix.
Solve the following boundary value problem
Calculate the eigenvalues of A.
Find the product of the positive elements above the main diagonal.
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