1. Write functions that add, subtract, and multiply two numbers in their digit-list representation (and return a new digit list).
2. Write a program that finds the longest palindromic substring of a given string.
3. Given a string, count the total number of consonants in it with a recursive function. A consonant is an English alphabet character that is not vowel (a, e, i, o, and u). Examples of constants are b, c, d, f, g, ..

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Functions to add subtract and multiply two numbers in their digitlist representation def addnumbersn... View the full answer