<P> A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward, such as madam or racecar or the number 10201 . Sentence - length palindromes may be written when allowances are made for adjustments to capital letters, punctuation, and word dividers, such as "A man, a plan, a canal, Panama!", "Was it a car or a cat I saw?" or "No' x' in Nixon". </P> <P> Composing literature in palindromes is an example of constrained writing . </P>

What is a number that is the same forwards and backwards