/in/isSibling.c: In function 'sort':
/in/isSibling.c:9:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<strlen(s)-1;i++)
              ^
/in/isSibling.c:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<strlen(s)-1-i;j++)
                  ^
/in/isSibling.c: In function 'isSibling':
/in/isSibling.c:21:10: warning: passing argument 1 of 'sort' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     sort(phrase1);
          ^~~~~~~
/in/isSibling.c:5:6: note: expected 'char *' but argument is of type 'const char *'
 void sort(char s[])
      ^~~~
/in/isSibling.c:22:10: warning: passing argument 1 of 'sort' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     sort(phrase2);
          ^~~~~~~
/in/isSibling.c:5:6: note: expected 'char *' but argument is of type 'const char *'
 void sort(char s[])
      ^~~~