def palindrome_recur(string):

    if len(string)==0 or 1:
        return True
    else:
        if string[0] == string[-1]:
            return palindrome_recur(string[1:-2])
        else:
            return False

if len(string)==0 or 1:

if len(string) <= 1:

if len(strg)==0 or len(strg)==1: