days := day-01 \ day-02 \ day-03 \ day-04 \ day-05 \ day-06 \ day-07 \ day-08 \ day-09 \ day-10 \ day-11 \ day-12 \ day-13 \ day-14 \ day-15 \ day-16 \ day-17 \ day-18 \ day-19 \ day-20 \ day-21 \ day-22 \ day-23 \ day-24 \ day-25 bench: @for day in $(days); do (cd $${day}; make $@); done