type         date         name
    ----    ---------------   ------------------------

    file    2023.09.12.1248   c1.c
    file    2023.09.12.1248   c2.c
    file    2023.09.12.1248   c3.c
    file    2023.09.12.1248   cartesian.c
    file    2023.09.12.1248   double_prism.c
    file    2023.09.12.1248   flat1.sh
    file    2023.09.12.1248   flat.sh
    file    2023.09.12.1248   Makefile.am
    file    2023.09.12.1248   Makefile.in