Solution: Letter Case Permutation
Explore how to generate all possible letter case permutations of a string containing letters and digits. Learn to use the subsets pattern in Python to create variations by toggling letter cases while leaving digits unchanged. Understand the step-by-step approach, and analyze the time and space complexities involved.
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Statement
Given a string, s, consisting of letters and digits, generate all possible variations by modifying each letter independently to be either lowercase or uppercase while keeping the digits unchanged. Each letter in the ...