#! /usr/bin/python
fruit = 'banana'
index = 0
while index < len(fruit):
	letter = fruit[index]
	print letter
	index = index + 1

print ' '
for char in fruit:
	print char

print ' '
prefixes = 'JKLMNOPQ'
suffix = 'ack'
for letter in prefixes:
	print letter + suffix

print ' '
print fruit[2:5]
print fruit[2:]
print fruit[:5]

print ' '
count = 0
for letter in fruit:
	if letter == 'a':
		count = count + 1
print count


print ' '
print fruit.upper()

print ' '
print fruit.find('na')
print fruit.find('na', 3)


print ' '
def in_both(word1, word2):
	for letter in word1:
		if letter in word2:
			print letter

in_both('apples', 'oranges')