#include <stdio.h>
char *ft_strcapitalize(char *str)
{
    int index = 0;
    
    while (str[index] != '\0')
    {
        if (str[index] >= 'A' && str[index] <= 'Z')
        {
            str[index] = str[index] + 32;
        }
        if ((str[index] >= 'a' && str[index] <= 'z') && str[index - 1] <= 47)
        {
            str[index] = str[index] - 32;
        }
        index++;
    }
    return (str);
}
int main() {
    char str[] = "salut, comment tu dusf;dou.vas BoaRDd HELLO ? 42\nmots quarante-deux; cinquante+et+un";
    ft_strcapitalize(str);
    printf("%s\n", str);
    return 0;
}