This is what we did in class on Feb 7.

     5	9:57	grep '^ epl' README.english
     6	9:57	grep '^ epl' README.english
     7	9:58	grep '^epl' README.english
     8	9:59	grep '^ *epl' README.english
     9	10:00	egrep '^ *(epl|epw)' README.english
    10	10:04	egrep '^[^ *] *(epl|epw)' README.english
    11	10:05	cd /corpora/treebank2/raw/wsj/
    12	10:05	ls
    13	10:05	cd 05
    14	10:05	ls
    15	10:07	head -10 wsj_0564 | grep -i ' [a-z][a-z][a-z][a-z][a-z] ' | wc
    16	10:08	head -10 wsj_0564 | grep -i ' [a-z][a-z][a-z][a-z][a-z] '
    17	10:08	pwd
    18	10:09	head -10 wsj_0564 | grep -i ' [^b][a-z][a-z][a-z][a-z] '
    19	10:10	head -10 wsj_0564 | grep -i ' [^bs][a-z][a-z][a-z][a-z] '
    20	10:10	head -10 wsj_0564 | grep -i ' [^bsg][a-z][a-z][a-z][a-z] '
    21	10:18	head -10 wsj_0564 | grep -i ' [^aeiou][^aeiou]* '
    22	10:19	head -10 wsj_0564 | grep -i ' [^aeiouy][^aeiouy.]* ' | wc -l
    23	10:19	head -10 wsj_0564 | grep -i ' [^aeiou][^aeiou]* ' | wc -l
    24	10:19	head -10 wsj_0564 | grep -i ' [^aeiouy][^aeiouy.]* '
    25	10:20	head -10 wsj_0564 | grep -i ' [^aeiouy][^aeiouy.-]* '
    26	10:21	grep -i ' [^aeiouy][^aeiouy.-]* ' wsj_0564
    27	10:21	grep -i ' [^aeiouy][^aeiouy.-]* ' wsj_0564 | wc -l
    28	10:21	grep -i ' [^aeiouy][^aeiouy.-]* ' wsj_0564 | wc -l
    29	10:22	grep -i ' [^aeiouy][^aeiouy.-%]* ' wsj_0564 | wc -l
    30	10:22	grep -i ' [^aeiouy0-9][^aeiouy0-9.-%]* ' wsj_0564 | wc -l
    31	10:22	grep -i ' [^aeiouy0-9][^aeiouy0-9.-%]* ' wsj_0564
    32	10:23	grep -i ' [^aeiouy0-9.][^aeiouy0-9.-%]* ' wsj_0564
    33	10:25	grep -i ' [^aeiouy0-9.][^aeiouy0-9./-%]* ' wsj_0564
    34	10:25	grep -i ' [^aeiouy0-9.-][^aeiouy0-9.-%]* ' wsj_0564
    35	10:28	grep -i ' [^aeiouy0123456789.][^aeiouy012345679.-%]* ' wsj_0564
    36	10:28	grep -i ' [^aeiouy0123456789.-][^aeiouy012345679.-%]* ' wsj_0564
    37	10:29	egrep '( [^aeiouy0123456789.-][^aeiouy012345679.-%]* |[A-Z]+)' wsj_0564
    38	10:31	grep -i ' [^aeiouy0123456789.-][^aeiouy012345679.-%]* ' wsj_0564 | grep [A-Z][A-Z]*
    39	10:31	grep -i ' [^aeiouy0123456789.-][^aeiouy012345679.-%]* ' wsj_0564 | grep '[A-Z][A-Z]*'
    40	10:32	grep -i ' [^aeiouy0123456789.-][^aeiouy012345679.-%]* ' wsj_0564 | grep -v '[A-Z][A-Z]*'
    41	10:33	echo history > ~/feb07
    42	10:33	more ~/feb07
    43	10:34	man echo
    44	10:34	history > ~/feb07