n = int(input())

counter = 10
final = []
potential = {}

for i in range(n):
    ans, won = input().split()
    won = int(won)
    
    if ans == "NIE":
        continue
    elif counter > 0:
        final.append(i+1)
        counter -= 1
    else:
        potential[i+1] = won
        
counter = 10
for x in potential:
    if counter == 0:
        break
    
    if potential[x] < 2:
        final.append(x)
        counter -= 1
        
        
for x in final:
    print(x, end=" ")