push 1
push 2
push 3
pop
pop
END

3
2

class Stack:
    def __init__(self):
        self.data = []
    def push(self, val):
        self.data.append(val)
    def pop(self):
        if not self.data:
            return 'EMPTY'
        return self.data.pop()

s = Stack()
results = []
while True:
    line = input().strip()
    if line == 'END':
        break
    parts = line.split()
    if parts[0] == 'push':
        s.push(int(parts[1]))
    else:
        results.append(str(s.pop()))
for r in results:
    print(r)