F                237 ext/digest/md5/md5.c   t = a + F(b,c,d) + X[k] + Ti;\
F                 75 ext/digest/rmd160/rmd160.c       (a) += F((b), (c), (d)) + (x);			\
F                100 ext/digest/rmd160/rmd160.c       (a) += F((b), (c), (d)) + (x);			\