# Example 1:   Write a function to reverse a string.
str = "Madam, I'm adam"
print str[::-1]
arr = [(x) for x in str]
n = len(arr)
for i in xrange(0,n//2):
    arr[i], arr[n-i-1] = arr[n-i-1], arr[i]
str = "".join(arr)
print str