The sentences that reads the same both in forward and reverse order are called palindromes sentences.
Forward: Never odd or even
Reversed: Neve ro ddo reven
⇒Neve r/o dd/o r/even
⇒Never odd or even
As the sentence 'Never odd or even' reads the same in both forward and reverse order, it is a palindrome.
Forward: Do geese see man
Reversed: nam ees eseeg do
Both are not same
Forward: Madam I'm Ram
Reversed: mar m'i madam
Both are not same