FO
FO(&p, &p, &keys[i]);
FO(&p, &p, &keys[rounds - 2]);
FO(&w3, &w0, ck1);
FO(&kr, &w2, ck3);
if (FO != NOSTR)
vstring("fo", FO);
&ES, &EX, &FO, &RC, &RE, &PA
EXTERN char *FO; /* force (literal next) char*/