Input: Palindrome checker Roman number converter Caesars cipher Telephone number validator

Palindrome checker

Return true if the given string is a palindrome. Otherwise, return false. A palindrome is a word or sentence that's spelled the same way both forward and backward, ignoring punctuation, case, and spacing.

Test cases

• eye should return true.
• _eye should return true.
• _eye should return true.
• not a palindrome should return false.
• A man, a plan, a canal. Panama should return true.
• never odd or even should return true.
• nope should return false.
• almostomla should return false.
• My age is 0, 0 si ega ym. should return true.
• 1 eye for of 1 eye. should return false.
• 0_0 (: /-\ :) 0-0 should return true.
• five|\_/|four should return false.