a=[]
for i in range(10):
    n=int(input('enter any no'))
    a.append(n)

stack=[]
def Push(a):
    for i in a:
        if i%3==0:
            stack.append(i)
def Pop(stack):
    stack.pop()

def display():
    for i in range(len(stack)-1,-1,-1):
        print(stack[i])

while True:
    print('1.Push ')
    print('2.POP')
    print('3.Display')
    print('4 Exit')
    ch=int(input('enter choice'))
    if ch==1:
        Push(a)
    elif ch==2:
        Pop(stack)
    elif ch==3:
        display()
    elif ch==4:
        break
'''
OUTPUT
enter any no34
enter any no24
enter any no15
enter any no67
enter any no69
enter any no46
enter any no58
enter any no69
enter any no53
enter any no90
1.Push 
2.POP
3.Display
4 Exit
enter choice1
1.Push 
2.POP
3.Display
4 Exit
enter choice3
90
69
69
15
24
1.Push 
2.POP
3.Display
4 Exit
enter choice2
1.Push 
2.POP
3.Display
4 Exit
enter choice3
69
69
15
24
1.Push 
2.POP
3.Display
4 Exit
enter choice4
'''