diff --git a/Makefile b/Makefile
index 5bb6c56..078b2e2 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: thifranc <marvin@42.fr>                    +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2016/02/04 19:24:34 by thifranc          #+#    #+#              #
-#    Updated: 2017/10/19 11:07:09 by thifranc         ###   ########.fr        #
+#    Updated: 2017/11/28 19:22:00 by thifranc         ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -18,17 +18,17 @@ SRC = atoi itoa ptrf\
 			memalloc bzero memccpy memchr memset\
 			memmove memcmp memcpy memdel\
 			putnb_base putendl putendl_fd\
-			putnbr putnbr_fd putstr putstr_fd\
+			putnbr putnbr_fd putstr putstr_fd putstrdel\
 			putchar putchar_fd write_fd\
 			strcat striter strncpy strtrim\
 			strchr striteri strnequ\
 			strlcat strclr strjoin strnew\
-			strcmp strlen strnstr\
+			strcmpi strcmp strlen strnstr\
 			strcpy strmap strrchr\
 			strdel strmapi strsplit\
 			strdup strncat strstr\
 			strequ strncmp strsub\
-			tolower isalnum toupper isalpha\
+			strlower tolower isalnum toupper isalpha\
 			isascii isdigit isprint\
 			lstadd lstnew lstdelone lstiter lstmap lstdel\
 			get_char\
diff --git a/ft_putstrdel.c b/ft_putstrdel.c
new file mode 100644
index 0000000..a34ad89
--- /dev/null
+++ b/ft_putstrdel.c
@@ -0,0 +1,20 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_putstr.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thifranc <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2016/02/16 09:14:52 by thifranc          #+#    #+#             */
+/*   Updated: 2017/11/28 19:38:28 by thifranc         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+void	ft_putstrdel(char const *s)
+{
+	write(1, s, ft_strlen(s));
+	free((void *)s);
+	s = NULL;
+}
diff --git a/ft_strcmpi.c b/ft_strcmpi.c
index 562017e..0f336c2 100644
--- a/ft_strcmpi.c
+++ b/ft_strcmpi.c
@@ -6,13 +6,13 @@
 /*   By: thifranc <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2016/02/14 11:35:35 by thifranc          #+#    #+#             */
-/*   Updated: 2017/10/30 17:18:07 by thifranc         ###   ########.fr       */
+/*   Updated: 2017/10/30 17:21:11 by thifranc         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "libft.h"
 
-int		ft_strcmp(const char *s1, const char *s2)
+int		ft_strcmpi(const char *s1, const char *s2)
 {
 	unsigned int	i;
 
diff --git a/ft_strlower.c b/ft_strlower.c
new file mode 100644
index 0000000..972caa3
--- /dev/null
+++ b/ft_strlower.c
@@ -0,0 +1,28 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strlower.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thifranc <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2017/10/30 17:23:15 by thifranc          #+#    #+#             */
+/*   Updated: 2017/10/30 17:38:43 by thifranc         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+char *ft_strlower(char *s)
+{
+	int	i;
+
+	i = 0;
+	if (!s)
+		return (NULL);
+	while (s[i])
+	{
+		s[i] = ft_tolower(s[i]);
+		i++;
+	}
+	return (s);
+}
diff --git a/libft.h b/libft.h
index 02dddd4..aa2c055 100644
--- a/libft.h
+++ b/libft.h
@@ -6,7 +6,7 @@
 /*   By: thifranc <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2016/02/19 10:07:41 by thifranc          #+#    #+#             */
-/*   Updated: 2017/10/30 17:14:52 by thifranc         ###   ########.fr       */
+/*   Updated: 2017/11/28 19:22:00 by thifranc         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -77,6 +77,7 @@ void				ft_putnb_base(int n, char *base);
 void				ft_putnbr_fd(int n, int fd);
 void				ft_putstr(char const *s);
 void				ft_putstr_fd(char const *s, int fd);
+void				ft_putstrdel(char const *s);
 char				**ft_realloc(char **var, int add, int del);
 char				*ft_strcat(char *s1, const char *s2);
 size_t				ft_strlcat(char *dst, const char *src, size_t size);
@@ -109,6 +110,7 @@ char				*ft_strsub(char const *s, unsigned int start, size_t len);
 char				*ft_strtrim(char const *s);
 void				ft_swap(void **a, void **b);
 void				ft_tabnew(int *itab, int size);
+char				*ft_strlower(char *s);
 int					ft_tolower(int c);
 int					ft_toupper(int c);
 void				ft_write_fd(char *str, int fd);