from time import gmtime, strftime;data = { }
while True:
  inp = raw_input().split(" ")
  if inp[0] == '*':
    data = { }
  elif len(inp) < 2:
    break
  else:
    if inp[0] == '!':
      del data[inp[1]]
    elif inp[0] == '?':
      if inp[1] in data:
        print data[inp[1]]
    else:
      data[inp[0]] = inp[1]

def quine(source):
  global data
  f = open('session' + strftime("%Y-%m-%d-%H-%M-%S", gmtime()) + '.py', 'w')
  quote = '"' * 3
  f.write('from time import gmtime, strftime;data = ' + repr(data) + source + '(' + quote + source + quote + ')')
  f.close()

quine("""
while True:
  inp = raw_input().split(" ")
  if inp[0] == '*':
    data = { }
  elif len(inp) < 2:
    break
  else:
    if inp[0] == '!':
      del data[inp[1]]
    elif inp[0] == '?':
      if inp[1] in data:
        print data[inp[1]]
    else:
      data[inp[0]] = inp[1]

def quine(source):
  global data
  f = open('session' + strftime("%Y-%m-%d-%H-%M-%S", gmtime()) + '.py', 'w')
  quote = '"' * 3
  f.write('from time import gmtime, strftime;data = ' + repr(data) + source + '(' + quote + source + quote + ')')
  f.close()

quine""")