#0:20-1:20
a=[3,10,-1]
print (a)
#1:20-3:10
a.append(1)
print(a)
a.append("hello")
print(a)
a.append([1,2])
print(a)
#3:10-4:10
a.pop()
print(a)
a.pop()
print(a)
#4:10-5:30
print(a[0])
print(a[3])
#5:30-9:55
a[0]=100
print(a)
b=["banana","apple","microsoft"]
print(b)
temp=b[0]
b[0]=b[2]
b[2]=temp
print(b)
b[0],b[2]=b[2],b[0]
print(b)

