#define A(c)            (c)-0x19
#define UNHIDE_STR(str) do { char *p = str;  while (*p) *p++ += 0x19; } while (0)
#define HIDE_STR(str)   do { char *p = str;  while (*p) *p++ -= 0x19; } while (0)

char pass[] = {
    A('c'), A('a'), A('t'), A('z'), A('r'), A('u'), A('l'), 0
};