# Ex B.1

print

# Ex B.2

x += 10

# Ex B.3

s = ' '.join(los)

# Ex B.4

s = ''.join(los)

# Ex B.5

s = '\n'.join(los)

# Ex B.6

lst2 = lst[:5]

# Ex B.7

x in 'aeiou'

# Ex B.8

first = grid[0][0]

# Ex B.9

grid[0][0] = 42

# Ex B.10

for l in f:
    print l.upper(),

# Ex B.11

s = s[::-1].upper()


bcc6d81fbfff4a8083f3e8c6453adcbd73ab4432
# Ex B.1

print

# Ex B.2

x += 10

# Ex B.3

s = ' '.join(los)

# Ex B.4

s = ''.join(los)

# Ex B.5

s = '\n'.join(los)

# Ex B.6

lst2 = lst[:5]

# Ex B.7

x in 'aeiou'

# Ex B.8

first = grid[0][0]

# Ex B.9

grid[0][0] = 42

# Ex B.10

for l in f:
    print l.upper(),

# Ex B.11

s = s[::-1].upper()

