mc@mc:~/mashdata$ awk '1{print }' file{5,7}
abc
123
ttt
kkk
111 wed
222 kad
333 ttt
444 kkk
mc@mc:~/mashdata$ csvjoin -H -d ' ' -c 2,1 file{5,7}
/usr/lib/python3/dist-packages/agate/table/from_csv.py:88: RuntimeWarning: Column names not specified. "('a',)" will be used as names.
/usr/lib/python3/dist-packages/agate/table/from_csv.py:88: RuntimeWarning: Column names not specified. "('a', 'b')" will be used as names.
Column 1 is invalid. The last column is 'a' at index 0.