local n = io.read("*n")
local t = {}
for i = 1, n do
  local pi = io.read("*n")
  for j = 1, pi do
    local z = io.read("*n")
    table.insert(t, {z, j * n + i})
  end
end
table.sort(t, function(x, y) return x[2] < y[2] end)
local s = {}
for i = 1, #t do
  s[i] = t[i][1]
end
print(table.concat(s, " "))