-chess: chess.c
-chess: /usr/include/stdio.h
-fish: fish.c
-arithmetic: arithmetic.c
-arithmetic: /usr/include/stdio.h
-arithmetic: /usr/include/signal.h
-btlgammon: btlgammon.c
-btlgammon: /usr/include/stdio.h
-banner: banner.c
-banner: /usr/include/stdio.h
-bcd: bcd.c