#print
How many spelling mistakes are there in the file "Ref",
according to "spell"?
Type "answer N", where N is the number you decide on.
#create Ref
Bianchi
Blue
Feldman
McIlroy
Roome
Rosin
Rosler
Aho
Bourne
Dvorak
Haley
Harris
Holt
Johnson
Mashey
Mitze
Muha
Nelson
Pinson
Plauger
Spivack
Thompson
Weinberger
Lesk
Ossanna
#
spell Ref | %s/../lcount >X2 &
#copyin
#user
#uncopyin
tail -1 .copy >X1
#cmp X2 X1
#log
#next
3.1c 10