foo.c: In function 'Diff':
foo.c:9:42: error: expected expression before '<' token
    9 |                 if (s[i] >= 'A' && s[i] =< 'Z')CNT++;
      |                                          ^
foo.c:10:42: error: expected expression before '<' token
   10 |                 if (s[i] >= 'a' && s[i] =< 'z')cnt++;
      |                                          ^
foo.c: In function 'main':
foo.c:18:9: warning: 'gets' is deprecated [-Wdeprecated-declarations]
   18 |         gets(s1);
      |         ^~~~
In file included from foo.c:1:
/nix/store/linb70pgp53f0kygxm5wk163dx22d681-glibc-2.37-45-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~
foo.c:19:9: warning: 'gets' is deprecated [-Wdeprecated-declarations]
   19 |         gets(s2);
      |         ^~~~
/nix/store/linb70pgp53f0kygxm5wk163dx22d681-glibc-2.37-45-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~

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