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n = int(input())

top = 0

for i in range(1,n+1):
    a, b = input().split()
    b = int(b)
    if top < 10:
        if a == 'TAK':
            print(i, end=' ')
            top += 1
    elif top < 20:
        if a == 'TAK' and b < 2:
            print(i, end='\n' if top == 19 else ' ')
            top += 1
    else:
        pass