Nu
if (Nu(w))
db_printf("%s\t%%r%d,%%r%d", Nu(w)?",n":"", Rsa(w), Rtb(w));
db_printf("%s\t%%r%d(%%r%d)", Nu(w)?",n":"", Rsa(w), Rsb(w));
p = Nu(w)? ",n":"";
db_printf("%s\t%%r%d,%%r%d,", Nu(w)?",n":"", Rsa(w), Rsb(w));
db_printf("%s\t%d,%%r%d,", Nu(w)? ",n":"", Ima5(w), Rsb(w));
p = Nu(w)? ",n":"";