# Answers to class exercises on strings

A = "Now is the time to panic"
#pos:012345678901234567890123456789

#1. retrieving "the"
print A[7:10]

#2. creating "panic time"
print A[19:]+A[10:15]

#3. create Reverse(s) (equivalent to s[::-1]
def Reverse(s):
    answer = ''
    i = len(s)-1
    while i >= 0:
        answer += s[i]
        i -= 1
    return answer

# test #3:
print Reverse('abcde')

#4. Palindrome...
Teddy="A MAN A PLAN A CANAL PANAMA"
print Reverse(Teddy)

#5. Replace 'hp' with 'Harry Potter' and 'hpc' with 'Hewlett-Packard' assuming
#   that they're surrounded by spaces'
def HP_Replace(s):
    s = s.replace(' hp ', ' Harry Potter ')
    s = s.replace(' hpc ', ' Hewlett-Packard ')
    return s

# test #5:
print HP_Replace(' hp nearly destroyed hpc today when his wand touched a side of hpc ')