Write a function that checks whether a string is a palindrome

Examples

Write isPalindrome so that the following cases hold.

1. InputisPalindrome("Racecar")
   Outputtrue
2. InputisPalindrome("A man, a plan, a canal: Panama")
   Outputtrue
3. InputisPalindrome("hello")
   Outputfalse

1 more hidden test cases - 4 in total will be graded.