module Main where
import Data.Char
import Data.List
readInt :: IO Int
readInt = readLn
repea 0 = (putStrLn "")
repea t = do
a <- readInt
mapM_ putStrLn $ permutations $ map (\x -> chr(x + 97)) [0..(a-1)]
repea (t - 1)
main = do
t <- readInt
repea t