Basic exercises
Enter a regexp that matches words per the instructions. Example of words which should be matched are given below the instructions. The answer is accepted only if all example words are matched, but at the same time words not belonging to the group are not. For example, the asnwer .* in the first exercise will not be accepted, because while it does match all 5-character words, it also matches words containing 2 characters or 10 characters.

Exercise 1

Match words containing exactly 5 characters.

Find
which
about
power
where
while
.{5}.....
WELL DONE!
INCOMPLETE SOLUTION


Exercise 2

Match words containing exactly 4 characters with the first two of them being 'lo'.

Find
look
long
love
logo
lo..lo.{2}
WELL DONE!
INCOMPLETE SOLUTION


Exercise 3

Match all words containing at least 10 characters.

Find
production
organization
internationally
internationally
WELL DONE!
INCOMPLETE SOLUTION


Exercise 4

Match words starting with the negative prefix un-.

Find
unlike
uncertainty
unlimited
uncomfortable
WELL DONE!
INCOMPLETE SOLUTION


Exercise 5

Match words starting with one of the following negative prefixes: im-, in-.

Find
injustice
imperfect
inevitable
incomplete
impossible
(im|in).*
WELL DONE!
INCOMPLETE SOLUTION


Exercise 6

Match words ending with the suffix -less.

Find
countless
useless
homeless
careless
WELL DONE!
INCOMPLETE SOLUTION


Exercise 7

Match words consisting of lower-case letters only.

Find
countless
look
where
hero
WELL DONE!
INCOMPLETE SOLUTION


Exercise 8

Match acronyms, i.e. words consisting of capital letters only.

Find
X
DNA
NATO
TV
WELL DONE!
INCOMPLETE SOLUTION


Exercise 9

Match acronyms containing at least 2 capital characters.

Find
DNA
TV
PDF
ID
WELL DONE!
INCOMPLETE SOLUTION


Exercise 10

Match possessive nouns/pronouns in singular.

Find
one's
family's
everyone's
sister's
mother's
WELL DONE!
INCOMPLETE SOLUTION


Exercise 11

Match years from the 18. century.

Find
1758
1795
1701
1799
WELL DONE!
INCOMPLETE SOLUTION


Exercise 12

Match adjectives in the following format:

Find
17-year-old
2-year-old
26-year-old
WELL DONE!
INCOMPLETE SOLUTION


Exercise 13

Match numbers followed by a full stop (dot).

Find
2.
80.
19.
WELL DONE!
INCOMPLETE SOLUTION


Exercise 14

Match one or more questioning marks.

Find
?
???
WELL DONE!
INCOMPLETE SOLUTION


Regexp on tags

In this part, the goal is to match a specific group of words using the tagset available at this link .
This can be used in the CQL query type in the format [tag="value"] where value is the given regexp you should enter.


Exercise 15

Search for all nouns.

Find
NN
NNS
NNSZ
NPZ
WELL DONE!
INCOMPLETE SOLUTION


Exercise 16

Search for all foreign words.

Find
FW
WELL DONE!
INCOMPLETE SOLUTION


Exercise 17

Search for possessive nouns.

Find
NNSZ
NNZ
WELL DONE!
INCOMPLETE SOLUTION


Exercise 18

Search for nouns in singular (excluding proper nouns).

Find
NN
NNZ
(NNZ|NN)
WELL DONE!
INCOMPLETE SOLUTION


Exercise 19

Search for all nouns in singular (including proper nouns).

Find
NN
NNZ
NP
NPZ
WELL DONE!
INCOMPLETE SOLUTION


Exercise 20

Search for adverbs in comparative and superlative forms.

Find
RBR
RBS
WELL DONE!
INCOMPLETE SOLUTION


Exercise 21

Search for adverbs and adjectives in comparative and superlative forms.

Find
RBR
RBS
JJR
JJS
WELL DONE!
INCOMPLETE SOLUTION


Exercise 22

Find all verbs in the past tense.

Find
VBD
VHD
VVD
WELL DONE!
INCOMPLETE SOLUTION


Exercise 23

Find the verb be in any form.

Find
VB
VBZ
VBG
WELL DONE!
INCOMPLETE SOLUTION


Exercise 24

All words except for nouns (i.e. tags which do not start with N).

Find
VB
Z
WRB
CD
WELL DONE!
INCOMPLETE SOLUTION