age = 24
age1=26
print("My age is " + str(age) + " years.")
print("My age is {0}-{1} years.".format(age,age1))

print("There are {0} days in {1}, {2}, {3}, {4}, {5}, {6} and {7}"
      .format(31,"Jan","March","May","July","August","October","December"))
print("There are {0} days in Jan, March, May, July, August, October and December"
      .format(31))

print("Jan: {2}, Feb: {0}, Mar: {2}, Apr: {1}, May: {2}, Jun: {1}, Jul: {2}, Aug: {2}, Sep: {1}, Oct: {2}, Nov: {1}, Dec: {2}"
      .format(28,30,31))

print()

print("""Jan: {2}
Feb: {0}
Mar: {2}
Apr: {1}
May: {2}
Jun: {1}
Jul: {2}
Aug: {2}
Sep: {1}
Oct: {2}
Nov: {1}
Dec: {2}
""".format(28,30,31))