A palindrome is a word or sentence that's spelled the same way both forward and backward, ignoring punctuation, case, and spacing.
Strings with varying formats, such as racecar, RaceCar, and race CAR among others can be passed, and the checker will verify if it is a palindrome. It is also possible to pass strings with special symbols, such as 2A3*3a2, 2A3 3a2, and 2_A3*3#A2.