#ifndef PERMUTATIONS_H
# define PERMUTATIONS_H

# include <stdlib.h>
# include <unistd.h>
# include <stdio.h>

void	ft_swap(char *a, char *b);
void	ft_sort_string(char *str);
void	ft_reverse(char *str, int start, int end);
int		next_permutation(char *str, int len);
int		ft_strlen(char *str);

#endif