import sequtils,strutils
var
    N = stdin.readline.parseInt
    ans = newSeq[int](0)
    Ls = newSeqWith(1005, newSeq[int](0))
    cnt = 0

for n in 0..<N:
    var L = stdin.readline.split.map(parseInt)
    Ls[n] = L

var f = true

while f:
    f = false
    cnt += 1
    for i in 0..<N:
        if Ls[i][0] < cnt:
            continue
        f = true
        ans.add(Ls[i][cnt])

for i,a in ans:
    stdout.write(a)
    if i == ans.high:
        stdout.write("\n")
    stdout.write(" ")