x2 = 1

for day in range(4,0,-1):

    x1 = (x2 + 1) * 2

    x2 = x1

print(x1)

for a in 'mirror':

    print(a, end="")

    if a == 'r':

        break

a = 123456789

b = "*"

print("{0:{2}>{1},}\n{0:{2}^{1},}\n{0:{2}<{1},}".format(a,20,b))

for s in "HelloWorld":

    if s=="W":

        continue

     print(s,end="")

print(pow(3,0.5)∗pow(3,0.5)==3)