def f():
   return "Numéro: {0}".format ( 12.33 )

def f():
   return "Numéro: " + str(12.330)

def f():
   return "Numéro: {0:.2f}".format ( 12 + 1/3 )

def f():
   return "Numéro: {0:.4f}".format ( 12 + 1/3 )

def f():
   return "Numéro: " + str(12) + "." + str(33)

def f():
   return "Numéro: {0}".format ( 12 + 1/3 )

def f():
   return "Numéro: {0:<.2}".format ( 12 + 1/3 )

def f():
    s = "abcdefegh"
    return s[-5:-3]

def f():
    s = "abcdefegh"
    return s[-4:-3]

def f():
    s = "abcdefegh"
    return s[-3:-4]

def f():
    s = "abcdefegh"
    return s[-3:-5]

def f():
    s = "abcdefegh"
    return s[4:5]

def f():
    s = "abcdefegh"
    return s[4:6]

def ab(s):
  for c in s:
    if c not in ["a","b"]:
      return False
  return True

def ab(s):
  for c in s:
    if c == "a" or c =="b":
      return True
  return False

def ab(s):
  for c in s:
    if c not in "ab":
      return False
  return True

def ab(s):
  return s == "ab"

def ab(s):
  return ( s in ["a","b"] )

def ab(s):
  for c in s:
    if c in ["a","b"]:
      return True
  return False

def ab(s):
  for c in s:
    if c in "ab":
      return True
  return False

def ab(s):
  for c in s:
    if c != "a" and c !="b":
      return False
  return True

def ranget2(n):
  l = []
  for i in range(n+1):
    l.append ( i * 2 )
  return l

def ranget2(n):
   return list(range(n+1)) * 2

def ranget2(n):
  return [ i * 2 for i in range(n+1) ]

def ranget2(n):
  l = []
  for i in range(n+1):
    l.add ( i * 2 )
  return l

def ranget2(n):
  l = []
  for i in range(n+1):
    l = l + i * 2
  return l

def replace(s,a,b):
  new_s = ""
  for c in s:
    if c == a:
      new_s = new_s + b
    else:
      new_s = new_s + a
  return new_s

def modify(l,a,b):
  for i in range(len(l)):
    l[i] = replace(l[i],a,b)

def replace(c,a,b):
  if c == a:
    return b
  else:
    return c

def modify(l,a,b):
  for i in range(len(l)):
    l[i] = [ replace(c,a,b) for c in l[i] ]

def replace(s,a,b):
  new_s = ""
  for c in s:
    if c == a:
      new_s = new_s + b
    else:
      new_s = new_s + c
  return new_s

def modify(l,a,b):
  for i in range(len(l)):
    l[i] = replace(l[i],a,b)

def replace(c,a,b):
  if c == a:
    return b
  else:
    return c

def modify(l,a,b):
  for i in range(len(l)):
    l[i] = "".join ( [ replace(c,a,b) for c in l[i] ] )

def replace(s,a,b):
  new_s = ""
  for c in s:
    if c == a:
      new_s = new_s + b
    else:
      new_s = new_s + a
  return new_s

def modify(l,a,b):
  new_l = []
  for s in l:
    new_l.append(replace(s,a,b))
  return new_l

def replace(s,a,b):
  new_s = ""
  for c in s:
    if c == a:
      new_s = new_s + b
    else:
      new_s = new_s + c
  return new_s

def modify(l,a,b):
  new_l = []
  for s in l:
    new_l.append(replace(s,a,b))
  return new_l