classmates = ['Michael', 'Bob', 'Tracy']
print classmates
print classmates[0]
#print classmates[3]
print classmates[-1]
classmates.append('adam')
print classmates
classmates.insert(1,'jack')
print classmates
classmates.pop()
print classmates
classmates.pop(1)
print classmates
classmates[1] = 'Sarch'
print classmates
L = ['apple',123,True]
s = ['python','java',['aps','php'],'schema']
print s
print len(s)
p = ['aps','php']
s = ['python','java',p,'schema']
print s
print p[1]
print s[2][0]
L =[]
print len(L)
