ips = str(input()).split(' ')
n = int(ips[0])
h = int(ips[1])
d = int(ips[-1])
arr = [int(x) for x in ips[2:-1]]
q = [h]
for i in range(len(arr)//2):
    a = arr[i*2]
    b = arr[i*2+1]
    q.insert(q.index(b)+1, a)
q.remove(d)
print(*q)