e =[20,10,50,30]
d =[]
c =['Hello','World',1,2,3]
a = [10,]
b =list('Hello')
print(a,b,c,d,e)
list = [20,10,50,30] 
list.append(80)
print(list)
t = [1,2,3]
list += t
print(list)
list = [20,10,50,30]
list.extend(t)
print(list)
list = [20,10,50,30]
list.insert(2,80)
print(list)
list = [20,10,50,30]
list[1] = 80
print(list)
list = [20,10,80,50,30]
list.remove(80)
print(list)