from collections import defaultdict

seat=[0 for i in range(21)]
order=[defaultdict(int) for i in range(21)]

def po(s):
  for i in range(1,21):
    if seat[i]==1:
      if order[i][s]>0:
        order[i][s]-=1
        print(i)
        return
  print(-1)
  return

N=int(input())
for i in range(N):
  S=[str(x) for x in input().split()]
  if S[0]=="0":
    n=int(S[1])
    m=int(S[2])
    seat[n]=1
    V=defaultdict(int)
    for j in range(m):
      V[S[3+j]]+=1
    order[n]=V
  elif S[0]=="2":
    n=int(S[1])
    seat[n]=0
  else:
    b=S[1]
    po(b)