isPalindrome that checks if a given substring is a palindrome.check that takes two strings a and b as arguments.i starting from the beginning of a and j starting from the end of b.i and decrement j as long as a[i] is equal to b[j].isPalindrome to check if the remaining substring in a or b is a palindrome.true, then a palindrome can be formed, so return true.a and b.false.