lista = input().strip().split()
num = int(lista[0])
start = lista[1]
listb = lista[2:-1]
delete = lista[-1]
out = [start,]
for i in range(0,len(listb),2):
    a, b = listb[i+1],listb[i]
    if a in out:
        out.insert(out.index(a)+1, b)
out.remove(delete)
print(" ".join(out))