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cc = int(input())
arr = []
for x in range(cc):
  a = input().split()
  if a[0] == "TAK":
    if len(arr) > 9 and int(a[1]) > 1:
        continue
    arr.append(x+1)
    if len(arr) == 20:
        break
for a in arr:
    print(a, end = " ")