diff --git a/k&r/04-funcs-and-prog-struct/04-grep-grace.c b/k&r/04-funcs-and-prog-struct/04-grep/04-grep-grace.c
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-grep-grace.c
rename to k&r/04-funcs-and-prog-struct/04-grep/04-grep-grace.c
diff --git a/k&r/04-funcs-and-prog-struct/04-grep-input.c b/k&r/04-funcs-and-prog-struct/04-grep/04-grep-input.c
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-grep-input.c
rename to k&r/04-funcs-and-prog-struct/04-grep/04-grep-input.c
diff --git a/k&r/04-funcs-and-prog-struct/04-grep-opt.c b/k&r/04-funcs-and-prog-struct/04-grep/04-grep-opt.c
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-grep-opt.c
rename to k&r/04-funcs-and-prog-struct/04-grep/04-grep-opt.c