a=list((45,)*4)
print(a)list1 = [1, 2, 3, 4]
list2 = [5, 6, 7, 8]
print(len(list1 + list2))a=[14,52,7]
b=a.copy()
b is ax = [5, 4, 3, 2, 1]
x.extend(x)
print(x)m = {'Listen' :'Music', 'Play' : 'Games'}
n = m['Play']
print(n)