import sys
for line in sys.stdin:
a = line.split()
outputList = list()
outputList.append(int(a[1]))
for i in range(2,int(a[0])+1):
numLoc = outputList.index(int(a[2*i - 1]))
outputList.insert(numLoc+1,int(a[2*i-2]))
outputList.remove(int(a[-1]))
strRes = " ".join(map(str,[i for i in outputList]))
print(strRes)



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